CCDS Exam — Questions and Answers

Question 1: For DRG reimbursement purposes, which comorbid condition most significantly increases the complexity of a pressure ulcer admission?

Osteomyelitis underlying the pressure ulcer (Correct answer)
Mild anemia
Hypertension
Vitamin D deficiency

Correct answer: Osteomyelitis underlying the pressure ulcer

Osteomyelitis underlying a pressure ulcer is a major complication/comorbidity (MCC) that can shift the DRG to a significantly higher-paying tier.

Question 2: A hospitalist documents 'metabolic encephalopathy' in a patient with known cirrhosis and altered mental status. What should the CDS consider querying?

Whether the encephalopathy is hepatic in origin given the cirrhosis (Correct answer)
Whether the patient needs a psychiatric consultation
Whether to change the diagnosis to delirium
Whether the patient has a history of head trauma

Correct answer: Whether the encephalopathy is hepatic in origin given the cirrhosis

When a patient has cirrhosis and encephalopathy, the CDS should query whether the encephalopathy is hepatic in etiology, as hepatic encephalopathy has a higher CC/MCC impact.

Question 3: How does accurate documentation of complications and comorbidities (CCs/MCCs) directly impact a hospital's performance in the Value-Based Purchasing (VBP) program?

It increases the length of stay, which is a positive VBP metric.
It directly increases the payment for every admission, regardless of quality.
It guarantees the hospital will receive a bonus payment from CMS.
It ensures accurate risk adjustment, providing a more precise reflection of expected outcomes for a given patient population. (Correct answer)

Correct answer: It ensures accurate risk adjustment, providing a more precise reflection of expected outcomes for a given patient population.

VBP compares hospitals on risk-adjusted measures. Accurate capture of CCs/MCCs leads to a higher case mix index (CMI) and more accurate risk-adjustment, ensuring the hospital's performance is compared fairly against its peers. It demonstrates that the hospital treats sicker patients, which is a critical context for evaluating outcomes.

Question 4: A patient is admitted with acute respiratory failure and pneumonia. The physician documents acute respiratory failure as the condition requiring the most intensive management. Per UHDDS and ICD-10-CM guidelines, what is the principal diagnosis?

Pneumonia, because it caused the respiratory failure
Whichever condition the physician lists first in the H&P
Acute respiratory failure, because it required the most resources (Correct answer)
Both conditions are co-principal and either may be sequenced first

Correct answer: Acute respiratory failure, because it required the most resources

When the attending physician identifies the condition requiring the most intensive management, that condition is selected as the principal diagnosis per UHDDS guidelines.

Question 5: A CDI specialist notices that a patient with acute respiratory distress syndrome (ARDS) is documented only as 'bilateral pneumonia' by the attending. What clinical documentation would BEST support querying for ARDS?

Fever and bilateral lung infiltrates on chest X-ray only
Mechanical ventilation requirement regardless of P/F ratio or imaging findings
SpO2 below 88% on room air at any point during the hospitalization
Berlin criteria: acute onset within 7 days, bilateral infiltrates not fully explained by cardiac failure, and P/F ratio 300 or below despite PEEP at or above 5 cm H2O (Correct answer)

Correct answer: Berlin criteria: acute onset within 7 days, bilateral infiltrates not fully explained by cardiac failure, and P/F ratio 300 or below despite PEEP at or above 5 cm H2O

The Berlin Definition of ARDS requires: acute onset within one week of clinical insult, bilateral opacities on imaging not fully explained by effusions/collapse/nodules, respiratory failure not fully explained by cardiac failure or fluid overload, and decreased P/F ratio with PEEP at or above 5 cmH2O.

Question 6: Under the HAC payment adjustment, which of the following conditions would trigger a payment reduction if NOT documented as present on admission?

Community-acquired pneumonia
Diabetic ketoacidosis
Central line-associated bloodstream infection (CLABSI) (Correct answer)
Congestive heart failure exacerbation

Correct answer: Central line-associated bloodstream infection (CLABSI)

CLABSI is one of CMS's designated HACs. When CLABSI develops during the hospitalization and is not documented as POA=Y, CMS will not pay the additional costs associated with treating that complication.

Question 7: A physician documents 'urosepsis' for a patient with a UTI and fever but no organ dysfunction. What is the CDI specialist's best action?

Accept the documentation as it meets Sepsis-3 criteria
Query the physician because Sepsis-3 requires evidence of organ dysfunction (Correct answer)
Query only if the patient required ICU admission
Code urosepsis as a secondary diagnosis without querying

Correct answer: Query the physician because Sepsis-3 requires evidence of organ dysfunction

Sepsis-3 requires life-threatening organ dysfunction in addition to infection, so 'urosepsis' without organ dysfunction should prompt a clarification query.

Question 8: In a clinical data quality audit, a CDS specialist finds that 15% of records lack a principal diagnosis. This metric is best classified as a measure of:

Data validity
Data timeliness
Data completeness (Correct answer)
Data reliability

Correct answer: Data completeness

Completeness measures whether required data elements are present in the record.

Question 9: Which coding system is used to classify diseases and health conditions?

HCPCS
CPT
LOINC
ICD-10-CM (Correct answer)

Correct answer: ICD-10-CM

ICD-10-CM (International Classification of Diseases, Tenth Revision, Clinical Modification) is the coding system specifically used in the United States to classify diseases, injuries, signs, symptoms, and external causes of injury and disease. It provides a comprehensive and detailed set of codes that allow for precise documentation of patient diagnoses and health conditions. This system is crucial for billing, epidemiological studies, and healthcare management.

Question 10: The Uniform Hospital Discharge Data Set (UHDDS) provides official definitions for which of the following?

Principal diagnosis and other diagnoses (Correct answer)
Sepsis-3 clinical criteria
Appropriate use of physician queries
Hospital-Acquired Conditions (HACs)

Correct answer: Principal diagnosis and other diagnoses

The UHDDS was established to create a standardized system for collecting hospital data. It provides the core definitions for principal diagnosis, other (secondary) diagnoses, and significant procedures, which are foundational to inpatient coding and reporting.

Question 11: A patient admitted for elective knee replacement develops a deep surgical site infection (SSI) post-operatively. Under HAC rules, how does documentation of the SSI affect reimbursement?

The SSI code is excluded from the claim entirely to avoid payment penalty
The SSI is coded with POA=W since surgical complications are clinically undeterminable
The SSI is coded but POA=N triggers the HAC payment adjustment, reducing reimbursement (Correct answer)
The SSI is coded with POA=Y to avoid payment reduction

Correct answer: The SSI is coded but POA=N triggers the HAC payment adjustment, reducing reimbursement

SSI is a CMS-designated HAC. Since it developed post-operatively (not present at admission), it is coded with POA=N. This triggers the HAC payment adjustment where CMS reassigns the DRG to the version without the SSI complication, reducing payment.

Question 12: Which quality metric measures the rate of complications that could reasonably have been prevented through optimal care?

Case Mix Index (CMI)
Geometric Mean Length of Stay (GMLOS)
Patient Safety Indicators (PSIs) (Correct answer)
Average Length of Stay (ALOS)

Correct answer: Patient Safety Indicators (PSIs)

Patient Safety Indicators (PSIs) are AHRQ-developed metrics that flag potentially preventable complications and adverse events during hospitalization. CDI specialists monitor PSIs because incomplete documentation can cause avoidable PSI flags that negatively impact hospital quality scores.

Question 13: Which quality program uses the Excess Days in Acute Care (EDAC) measure alongside readmissions?

Hospital-Acquired Condition Reduction Program (HACRP)
Hospital Value-Based Purchasing (HVBP)
Hospital Readmissions Reduction Program (HRRP) (Correct answer)
Inpatient Quality Reporting (IQR)

Correct answer: Hospital Readmissions Reduction Program (HRRP)

The HRRP uses the EDAC measure, which captures not only 30-day readmissions but also observation stays and ED visits within 30 days of discharge.

Question 14: When documenting wound tunnel length in the medical record, why is this measurement clinically significant for CDI purposes?

Tunnel length is required for all pressure ulcer codes to be valid
Tunneling may indicate a sinus tract or abscess formation, which could support coding of an additional complication such as abscess (Correct answer)
Tunnel length determines the ICD-10-CM stage assigned to the ulcer
It determines the dressing reimbursement tier under Medicare Part A

Correct answer: Tunneling may indicate a sinus tract or abscess formation, which could support coding of an additional complication such as abscess

Documented tunneling may indicate an underlying sinus tract or abscess, which the CDI specialist should query the physician to confirm and potentially code as an additional complication.

Question 15: A hospital's CDI program tracks 'documentation integrity rate,' defined as the percentage of medical records that accurately reflect the patient's clinical condition without requiring post-discharge amendments. A low rate indicates:

Concurrent CDI review is failing to catch documentation gaps before discharge (Correct answer)
The hospital has an unusually high patient acuity that exceeds CDI capacity
Physicians are responding to queries too quickly without clinical review
CDI staff are reviewing too many charts concurrently

Correct answer: Concurrent CDI review is failing to catch documentation gaps before discharge

A low documentation integrity rate means records frequently need post-discharge amendments, indicating that the concurrent CDI review process is not catching documentation gaps before the patient is discharged.

Question 16: What does CPT stand for in clinical coding?

Coding and Procedure Tracking
Current Procedural Terminology (Correct answer)
Clinical Pathology Techniques
Clinical Procedure Testing

Correct answer: Current Procedural Terminology

CPT stands for Current Procedural Terminology, which is a medical code set maintained by the American Medical Association (AMA). This system is used to describe medical, surgical, and diagnostic services performed by physicians and other healthcare providers. CPT codes are essential for billing and reimbursement, allowing for standardized reporting of procedures and services across the healthcare industry.

Question 17: In the context of present on admission (POA) indicators, which condition would be assigned a POA indicator of 'N'?

A UTI documented at the time of admission
A pressure injury that developed two days after admission (Correct answer)
Chronic hypertension noted in the history and physical
A fracture that was the reason for admission

Correct answer: A pressure injury that developed two days after admission

A POA indicator of 'N' is assigned when the condition was not present at the time of admission, such as a hospital-acquired condition.

Question 18: Which of the following documentation elements is REQUIRED by CMS Conditions of Participation for all inpatient medical records?

Authenticated history and physical completed within 24 hours of admission or prior to surgery (Correct answer)
Nursing care plan updated every shift for the entire hospitalization
Daily physician progress notes co-signed by the attending
Nutritional assessment completed within 24 hours of admission

Correct answer: Authenticated history and physical completed within 24 hours of admission or prior to surgery

CMS Conditions of Participation require that a history and physical examination be completed and authenticated within 24 hours of admission or before any surgery.

Question 19: Which of the following conditions would most likely map to a high-value HCC category, making it a priority for CDI query?

Common cold
Acute sinusitis
Hypertension without complications
Type 2 diabetes with diabetic chronic kidney disease, stage 3 (Correct answer)

Correct answer: Type 2 diabetes with diabetic chronic kidney disease, stage 3

Diabetes with CKD as a complication maps to a high-severity HCC category because it predicts significantly higher expected healthcare costs. Hypertension without complications, acute sinusitis, and viral URIs carry little or no HCC weight, as they do not substantially predict elevated resource utilization.

Question 20: A CDI specialist notices that a physician's query response adds a new diagnosis that contradicts an earlier note in the same record. What should the CDI specialist do?

Accept the query response and code the new diagnosis immediately
Notify the physician of the contradiction and ask for a clarifying addendum (Correct answer)
Disregard the query response and code based on the earlier note
Escalate directly to the compliance department without notifying the physician

Correct answer: Notify the physician of the contradiction and ask for a clarifying addendum

When a query response contradicts earlier documentation, the CDI specialist should bring the contradiction to the physician's attention and request a clarifying addendum that reconciles the discrepancy.

Question 21: What is the primary purpose of the Medicare 'Two-Midnight Rule'?

To define the criteria for medical necessity of a surgical procedure.
To determine if a hospital stay should be paid as inpatient (Part A) or outpatient (Part B). (Correct answer)
To mandate that all patients must be discharged after two midnights.
To set a maximum length of stay for a given diagnosis.

Correct answer: To determine if a hospital stay should be paid as inpatient (Part A) or outpatient (Part B).

The Two-Midnight Rule is a policy that guides admitting physicians on when to admit a patient as an inpatient. It generally considers a hospital stay spanning two midnights to be appropriate for inpatient payment under Medicare Part A.

Question 22: When is a verbal physician query considered acceptable under CDI compliance standards?

Only when the written query response is also documented in the medical record (Correct answer)
Never; all queries must be in written or electronic format
For all queries, as verbal communication is faster and more efficient
For routine coding clarifications that do not affect DRG assignment

Correct answer: Only when the written query response is also documented in the medical record

Verbal queries may be used but are only acceptable if the physician's response and the clinical basis for the query are documented in the medical record.

Question 23: What is the PRIMARY goal of a CDI program's denials management process?

To train physicians to avoid documenting conditions that trigger payer reviews
To identify patterns in denied claims and use them to improve documentation and coding upstream (Correct answer)
To recode denied claims to lower-cost DRGs to avoid future denials
To appeal all payer denials regardless of clinical merit

Correct answer: To identify patterns in denied claims and use them to improve documentation and coding upstream

The primary goal of denials management is to use denial data as a feedback loop to identify systematic documentation or coding gaps and correct them proactively.

Question 24: Which ICD-10-CM code category is used to report sepsis due to a gram-positive organism when the specific organism is identified?

R65.2 - Severe sepsis
A02.1 - Salmonella septicemia
A41 - Other sepsis (Correct answer)
A40 - Streptococcal sepsis

Correct answer: A41 - Other sepsis

Category A41 (Other sepsis) covers sepsis due to specific organisms including Staphylococcus aureus. The specific organism code from A40-A41 is sequenced first, followed by R65.2x if severe sepsis criteria are met.

Question 25: A patient admitted for a simple UTI (a low-mortality DRG) dies unexpectedly. A CDI review is initiated to assess for PSI 02 (Death in Low-Mortality DRGs). What is the most important documentation focus for the CDI specialist?

Confirming the patient's age and discharge disposition.
Identifying and clarifying all active comorbidities and complications that increase the risk of mortality. (Correct answer)
Ensuring the documentation of the patient's code status (e.g., DNR).
Verifying that the correct antibiotics were administered for the UTI.

Correct answer: Identifying and clarifying all active comorbidities and complications that increase the risk of mortality.

PSI 02 flags deaths in what are expected to be low-risk admissions. The key to accurately reflecting the patient's risk is to capture all co-existing, active secondary diagnoses that contribute to a higher risk of mortality, such as severe sepsis, acute respiratory failure, or metastatic cancer. This demonstrates the patient was sicker than the principal diagnosis alone would suggest.

Question 26: Which ICD-10-PCS device character is used when a synthetic substitute mesh is placed during a ventral hernia repair?

No device (Z)
Synthetic substitute (J) (Correct answer)
Autologous tissue substitute (7)
Nonautologous tissue substitute (K)

Correct answer: Synthetic substitute (J)

Synthetic substitute (character J) is used in ICD-10-PCS when a synthetic mesh or other man-made material is placed during repair.

Question 27: Why is it important for CDI specialists to query for a specific type of acute kidney injury rather than accepting 'acute kidney failure, unspecified'?

Unspecified AKI always defaults to MCC status under MS-DRG grouping
Stage-specific AKI codes have no impact on MS-DRG assignment
Staging is only required for CKD documentation, not AKI
Specific AKI types such as tubular necrosis are MCCs while unspecified AKI is only a CC (Correct answer)

Correct answer: Specific AKI types such as tubular necrosis are MCCs while unspecified AKI is only a CC

N17.0 (tubular necrosis) is classified as an MCC while N17.9 (unspecified AKI) is only a CC, meaning specificity directly impacts MS-DRG weight and reimbursement.

Question 28: The UHDDS requires that secondary diagnoses be reported only when they affect patient care. Which of the following should NOT be reported?

A historical finding documented as 'history of appendectomy 10 years ago' (Correct answer)
Hypertension managed with continued home medications during the hospitalization
Type 2 diabetes requiring insulin management during the stay
Chronic kidney disease affecting medication dosing decisions

Correct answer: A historical finding documented as 'history of appendectomy 10 years ago'

A 'history of appendectomy' is a past procedure with no active management implications during the current stay. Historical conditions that do not affect current patient care, treatment, or monitoring do not meet the UHDDS reporting standard.

Question 29: A coder encounters a diagnosis of 'probable pneumonia' documented by the attending physician on an inpatient record. How should this be coded?

Code only symptoms such as cough and fever
Query the physician before coding anything
Code as 'rule-out' pneumonia using a Z code
Code the pneumonia as confirmed (Correct answer)

Correct answer: Code the pneumonia as confirmed

For inpatient records, UHDDS guidelines allow coding of conditions documented as 'probable' or 'suspected' as if confirmed.

Question 30: A hospital's CDI program tracks 'query agreement rate.' A low agreement rate most likely indicates:

The CDI program has an unusually complex patient population
Coders are not reviewing query responses before assigning codes
Queries are being sent without adequate clinical support or are poorly formulated (Correct answer)
Physicians are confirming queried diagnoses at a high rate

Correct answer: Queries are being sent without adequate clinical support or are poorly formulated

A low query agreement rate where physicians frequently respond 'clinically undetermined' or disagree with the queried diagnosis suggests queries lack sufficient clinical support or are poorly constructed.

Question 31: The MS-DRG system groups cases into Major Diagnostic Categories (MDCs) primarily based on which factor?

The patient's age and sex
The discharge disposition
The principal diagnosis (Correct answer)
The principal procedure

Correct answer: The principal diagnosis

MDC assignment is driven by the principal diagnosis, which determines the body system or disease category for the case.

Question 32: Under ICD-10-CM guidelines, when a patient is admitted for chemotherapy and develops a complication during the inpatient stay, what is the correct principal diagnosis?

The complication that developed during the stay
The malignancy for which chemotherapy is being administered
Encounter for antineoplastic chemotherapy (Z51.11) (Correct answer)
The complication if it required surgical intervention; otherwise the malignancy

Correct answer: Encounter for antineoplastic chemotherapy (Z51.11)

ICD-10-CM guidelines specify that when admission is for chemotherapy, Z51.11 is sequenced as principal regardless of complications that arise during the stay.

Question 33: What is the financial impact to a hospital if a patient acquires a Stage 3 pressure ulcer (a HAC) during their stay?

The entire claim is denied.
The hospital receives a quality bonus.
The DRG is paid as if the HAC was not present. (Correct answer)
There is no financial impact, it only affects quality scores.

Correct answer: The DRG is paid as if the HAC was not present.

Under the HAC Reduction Program, if a condition on the HAC list is acquired during the stay (POA = N or U), the DRG is recalculated for payment as if that secondary diagnosis were not present. This typically results in assignment to a lower-weighted and lower-paying DRG.

Question 34: According to the ACDIS/AHIMA Guidelines for Achieving a Compliant Query Practice, which of the following best describes a compliant physician query?

A verbal query documented only in the CDI specialist's personal notes, not in the medical record
A query sent only retrospectively after final coding is complete to avoid influencing care decisions
A query that suggests the diagnosis the hospital's CDI program needs to meet its case-mix index targets
A query presenting clinical indicators from the record and asking the physician to clarify or confirm a diagnosis in an unbiased, open-ended or multiple-choice format (Correct answer)

Correct answer: A query presenting clinical indicators from the record and asking the physician to clarify or confirm a diagnosis in an unbiased, open-ended or multiple-choice format

A compliant query must be based on clinical indicators present in the record, be unbiased in format (not leading the physician toward a financially favorable answer), and be clearly documented as part of the medical record. Queries sent purely for reimbursement purposes or that suggest a specific answer violate the ACDIS/AHIMA Practice Brief and raise FCA risk.

Question 35: Which diagnosis has a POA indicator exempt status and does not require POA reporting?

Hospital-acquired pressure ulcers
Deep vein thrombosis (DVT)
Ventilator-associated pneumonia
External cause codes (V, W, X, Y codes) for injuries (Correct answer)

Correct answer: External cause codes (V, W, X, Y codes) for injuries

External cause codes (ICD-10-CM V, W, X, Y codes) are exempt from POA reporting requirements. These codes describe circumstances of injury such as falls or motor vehicle accidents.

Question 36: Under the Two-Midnight Rule, which physician documentation element is MOST critical to support an inpatient admission?

The patient's out-of-pocket cost estimate and financial counseling note
The patient's insurance type and pre-authorization number
The number of procedures performed during the stay
The admitting physician's documented expectation that care will span at least two midnights (Correct answer)

Correct answer: The admitting physician's documented expectation that care will span at least two midnights

The Two-Midnight Rule requires that the admitting physician document a reasonable expectation that the patient will require hospital care spanning two midnights.

Question 37: A patient with a Stage 3 pressure ulcer on admission has the wound worsen to Stage 4 during hospitalization. How should the CDI specialist query this scenario?

Query to clarify whether the Stage 4 ulcer was present on admission or developed/worsened during the stay (Correct answer)
Document as an unavoidable complication requiring no query
Query for 'unstageable pressure ulcer' since the stage changed
Query for 'hospital-acquired Stage 4 pressure ulcer' only

Correct answer: Query to clarify whether the Stage 4 ulcer was present on admission or developed/worsened during the stay

The CDI specialist must clarify POA status because worsening from Stage 3 to Stage 4 may indicate a hospital-acquired condition, which has significant quality and reimbursement implications.

Question 38: A CDI specialist is training new staff on query language. Which of the following phrases is MOST appropriate to include in a compliant query?

'Documentation of malnutrition would more accurately reflect the care provided and improve reimbursement.'
'Please confirm the diagnosis of septic shock to support accurate MS-DRG assignment.'
'Based on the following clinical indicators, can you clarify or further specify the patient's condition?' (Correct answer)
'The current documentation does not support the level of care billed; please revise accordingly.'

Correct answer: 'Based on the following clinical indicators, can you clarify or further specify the patient's condition?'

A compliant query asks for clarification based on clinical evidence without suggesting a specific outcome or mentioning financial impact.

Question 39: When a surgical wound dehisces postoperatively, what documentation is needed for accurate coding?

Documentation as a new pressure injury since it occurred during hospitalization
Documentation as a postoperative complication specifying the wound and depth of disruption (Correct answer)
Documentation as an unrelated skin condition separate from the surgical episode
Documentation only as a wound requiring additional treatment

Correct answer: Documentation as a postoperative complication specifying the wound and depth of disruption

Wound dehiscence following a procedure is coded as a postoperative complication, with documentation distinguishing superficial skin disruption from deeper fascial or organ-level separation.

Question 40: A physician consistently documents 'urosepsis' without specifying if the patient has sepsis. What is the best long-term educational strategy for the CDS?

Continue to send a query on every case until the physician changes their behavior.
Provide the physician with a brief educational tip sheet explaining the clinical and coding definitions of sepsis and how 'urosepsis' is ambiguous. (Correct answer)
Report the physician to the Chief Medical Officer for non-compliant documentation.
Ask the coding department to always code 'urosepsis' to the UTI code.

Correct answer: Provide the physician with a brief educational tip sheet explaining the clinical and coding definitions of sepsis and how 'urosepsis' is ambiguous.

Providing a brief, evidence-based educational tip sheet or a face-to-face conversation explains the 'why' behind the need for specific documentation. It addresses the root cause of the documentation issue in a collaborative way, rather than just repeatedly querying the same issue.

Question 41: Under Sepsis-3, the term 'severe sepsis' has been eliminated as a clinical definition. How does this affect ICD-10-CM coding practice?

ICD-10-CM still uses R65.20/R65.21 for severe sepsis and septic shock, which are coded based on physician documentation regardless of Sepsis-3 terminology (Correct answer)
ICD-10-CM has also eliminated all 'severe sepsis' codes effective 2023
Sepsis-3 requires all sepsis coding to use A41.9 exclusively
Coders must apply Sepsis-3 criteria directly to assign R65.2x without physician documentation

Correct answer: ICD-10-CM still uses R65.20/R65.21 for severe sepsis and septic shock, which are coded based on physician documentation regardless of Sepsis-3 terminology

Although Sepsis-3 eliminated 'severe sepsis' as a clinical term, ICD-10-CM retains R65.20 (severe sepsis without septic shock) and R65.21 (severe sepsis with septic shock). Coding follows physician documentation.

Question 42: From a CDI perspective, why does accurate secondary diagnosis documentation have an even greater impact in APR-DRGs than in MS-DRGs?

APR-DRGs use secondary diagnoses to assign SOI and ROM subclasses, which directly affect the payment weight for each case (Correct answer)
MS-DRGs require more secondary diagnoses than APR-DRGs to assign correctly
Secondary diagnoses are not considered in either grouping system
APR-DRGs rely only on procedure codes to assign severity

Correct answer: APR-DRGs use secondary diagnoses to assign SOI and ROM subclasses, which directly affect the payment weight for each case

In APR-DRGs, each secondary diagnosis is evaluated for its contribution to SOI and ROM subclass assignment. A single well-documented comorbidity can elevate a case from SOI 2 (Moderate) to SOI 3 (Major), substantially changing expected resource use and reimbursement — an effect more granular than MS-DRG's binary MCC/CC distinction.

Question 43: What is the primary risk of using 'leading' language in a physician query?

It can be seen by auditors as introducing information to artificially inflate reimbursement. (Correct answer)
It is against hospital policy but has no external regulatory implications.
It may confuse the physician, leading to an incorrect response.
It often results in lower query response rates from providers.

Correct answer: It can be seen by auditors as introducing information to artificially inflate reimbursement.

Leading queries can be interpreted as introducing new information or influencing the physician's response, which could be viewed as evidence of a false claim by auditors. This undermines the integrity of the health record and can have significant legal and financial repercussions.

Question 44: When coding a patient with HIV disease who is admitted for an unrelated condition (e.g., a broken leg), what is the correct sequencing per ICD-10-CM guidelines?

Sequence whichever condition required more resources as principal
Always sequence B20 (HIV disease) as the principal diagnosis (Correct answer)
Do not code HIV if it was not treated during the encounter
Sequence the unrelated condition first, with B20 as an additional code

Correct answer: Always sequence B20 (HIV disease) as the principal diagnosis

ICD-10-CM guidelines instruct that B20 is always sequenced as the principal diagnosis when a patient with HIV is admitted, regardless of the reason for admission.

Question 45: A query asks a physician: 'Based on the elevated creatinine, BUN, and oliguria, does the patient have acute kidney injury?' This is an example of a:

Compliant query only if the patient's creatinine value is included
Non-compliant query because kidney injury queries require nephrologist co-signature
Compliant query because it presents clinical evidence without steering toward a specific answer (Correct answer)
Non-compliant query because it lists too many clinical indicators

Correct answer: Compliant query because it presents clinical evidence without steering toward a specific answer

Presenting objective clinical indicators (labs, vitals, symptoms) to support the query is compliant when no specific answer is implied.

Question 46: In ICD-10-PCS, which root operation is used to code the insertion of a cardiac pacemaker generator into the chest wall?

Supplement
Replacement
Insertion (Correct answer)
Fusion

Correct answer: Insertion

Insertion is the ICD-10-PCS root operation for putting in a nonbiological device that monitors, assists, performs, or prevents a physiological function.

Question 47: Which compliance framework do hospitals use to structure internal CDI and coding compliance programs?

The OIG Seven Elements of an Effective Compliance Program (Correct answer)
The CMS Conditions of Participation for Medical Records
The UHDDS Data Element Reporting Requirements
The Joint Commission ORYX Performance Measurement System

Correct answer: The OIG Seven Elements of an Effective Compliance Program

The OIG's Seven Elements of an Effective Compliance Program provide the foundational structure for hospital compliance programs, including CDI and coding compliance.

Question 48: A patient with severe heart failure has significant peripheral edema and ascites. How does this affect malnutrition assessment and documentation?

Edema is a sign of adequate protein stores and argues against malnutrition
Fluid retention increases muscle mass measurements, excluding malnutrition diagnosis
Fluid retention overestimates body weight, potentially masking weight loss from malnutrition (Correct answer)
ICD-10-CM excludes malnutrition coding when significant fluid retention is present

Correct answer: Fluid retention overestimates body weight, potentially masking weight loss from malnutrition

In patients with significant edema or ascites, body weight is overestimated because fluid accumulation masks actual lean tissue loss.

Question 49: Under KDIGO staging, a patient whose urine output drops to 0.3 mL/kg/hr for 20 consecutive hours would be classified as which AKI stage?

Chronic kidney disease exacerbation
AKI Stage 2
AKI Stage 3 (Correct answer)
AKI Stage 1

Correct answer: AKI Stage 3

KDIGO Stage 3 AKI includes urine output less than 0.3 mL/kg/hr for ≥12 hours or anuria for ≥12 hours.

Question 50: A patient with documented stage III pressure ulcer on the coccyx at admission progresses to stage IV during the hospitalization. How should the POA and final pressure ulcer stage be coded?

Code stage IV with POA=Y since the ulcer was present at admission regardless of progression (Correct answer)
Code stage III with POA=Y and do not code the progression
Code only stage IV with POA=N since that is the final documented stage
Code stage III with POA=Y and stage IV with POA=N as a separate diagnosis

Correct answer: Code stage IV with POA=Y since the ulcer was present at admission regardless of progression

When a pressure ulcer is present on admission at a lower stage and worsens during the hospitalization, the highest stage documented during the stay is coded with POA=Y.

Question 51: A CDI manager wants to benchmark their hospital's CMI against peer institutions. Which data source is MOST appropriate?

The hospital's billing department quarterly revenue reports
The state health department's annual discharge report
CMS Provider of Services file or Hospital Compare data (Correct answer)
The hospital's internal EHR analytics dashboard

Correct answer: CMS Provider of Services file or Hospital Compare data

CMS publicly reports CMI and other performance data through Hospital Compare and the Provider of Services file, enabling hospitals to benchmark themselves against peers of similar size, type, and geographic region.

Question 52: A CDI specialist wants to query about encephalopathy but the physician's notes only mention 'confusion.' Which approach is MOST compliant?

Do not query since 'confusion' is an acceptable alternative to encephalopathy
Send a query citing lab values, nursing notes, and imaging that support altered brain function (Correct answer)
Change the documentation from 'confusion' to 'encephalopathy' without a query
Send a query stating 'Please document encephalopathy to support the MCC code'

Correct answer: Send a query citing lab values, nursing notes, and imaging that support altered brain function

The compliant approach is to send a query citing the specific clinical indicators in the record such as abnormal labs, imaging findings, or nursing assessments that support a diagnosis of encephalopathy. The query should offer encephalopathy as one of multiple clinically plausible options.

Question 53: A patient admitted for a GI bleed undergoes an EGD (esophagogastroduodenoscopy) where a bleeding ulcer is identified and cauterized. How does the cauterization affect MS-DRG assignment?

It qualifies the EGD as an OR procedure, moving the case to a surgical DRG. (Correct answer)
It lowers the relative weight because the problem was fixed.
It has no effect on the MS-DRG.
It confirms the medical diagnosis but does not change the DRG.

Correct answer: It qualifies the EGD as an OR procedure, moving the case to a surgical DRG.

A purely diagnostic EGD is a non-OR procedure. Adding a therapeutic intervention like cautery makes it a significant OR procedure, which shifts the case from a medical MS-DRG (for GI bleed) to a higher-weighted surgical MS-DRG.

Question 54: What does a high CC and MCC capture rate indicate about a CDI program?

The average length of stay is artificially inflated
The hospital is upcoding claims inappropriately
The hospital treats a disproportionate share of Medicare patients
The CDI program is effectively identifying and documenting secondary diagnoses (Correct answer)

Correct answer: The CDI program is effectively identifying and documenting secondary diagnoses

A high CC/MCC capture rate reflects that the CDI program is successfully identifying and ensuring documentation of significant secondary diagnoses that affect patient severity and resource utilization.

Question 55: A patient with end-stage renal disease is admitted with confusion and altered mental status. The physician documents only 'AMS.' Which query is most clinically appropriate for the CDI specialist to send?

Query for Wernicke's encephalopathy
Query for uremic encephalopathy (Correct answer)
No query is needed; AMS is adequately specific
Query for septic encephalopathy

Correct answer: Query for uremic encephalopathy

End-stage renal disease causes accumulation of uremic toxins that impair brain function, making uremic encephalopathy the most clinically supported and specific diagnosis. 'AMS' does not capture this etiology and will not map to an MCC, while uremic encephalopathy does.

Question 56: Which of the following documentation examples provides the highest level of specificity for coding and MS-DRG impact?

Severe protein-calorie malnutrition (Correct answer)
Malnutrition
Failure to thrive
Nutritional deficiency

Correct answer: Severe protein-calorie malnutrition

Specifying the type and severity, such as 'Severe protein-calorie malnutrition,' provides the highest specificity. This diagnosis often qualifies as a Major Complication or Comorbidity (MCC), which has a significant impact on the MS-DRG assignment and reflects a higher severity of illness.

Question 57: The Cooperating Parties for ICD-10-CM/PCS include all of the following EXCEPT:

National Center for Health Statistics (NCHS)
American Medical Association (AMA) (Correct answer)
American Hospital Association (AHA)
American Health Information Management Association (AHIMA)

Correct answer: American Medical Association (AMA)

The four Cooperating Parties are AHIMA, AHA, NCHS, and CMS; the AMA maintains CPT, not ICD-10-CM/PCS.

Question 58: A CDS has sent two compliant, well-supported queries to a physician regarding the etiology of a patient's anemia, but has received no response. What is the most appropriate next step according to standard CDI practice?

Close the query as 'no response' and move on to the next chart.
Add a note in the chart stating 'Physician refused to clarify anemia etiology'.
Confront the physician in the hallway and demand an answer.
Follow the department's escalation policy, which may involve notifying the CDI manager or physician advisor. (Correct answer)

Correct answer: Follow the department's escalation policy, which may involve notifying the CDI manager or physician advisor.

A formal escalation process ensures that important documentation gaps are addressed while maintaining a professional and standardized approach. This usually involves a physician advisor who can engage the non-responsive physician in a peer-to-peer conversation.

Question 59: Which of the following query scenarios represents an INAPPROPRIATE use of a physician query?

Querying to clarify whether anemia is acute blood loss anemia versus iron deficiency anemia
Querying to confirm whether a wound infection meets criteria for postoperative wound dehiscence
Querying to document sepsis when the only basis is a desire to capture an MCC (Correct answer)
Querying to clarify the clinical significance of an abnormal laboratory finding

Correct answer: Querying to document sepsis when the only basis is a desire to capture an MCC

Queries must be based on clinical indicators in the record, not on financial motivations. Sending a query to capture an MCC designation for sepsis without any clinical indicators supporting sepsis is non-compliant and potentially fraudulent.

Question 60: A physician responds to a query by writing 'per CDI' next to a newly added diagnosis. The CDI specialist should:

Route the chart to compliance for automatic review since the physician responded
Code the diagnosis as documented because any physician attestation is sufficient
Ask the physician to re-document using their own clinical judgment without referencing the CDI query (Correct answer)
Accept the response because the physician did sign the entry, making it legally valid

Correct answer: Ask the physician to re-document using their own clinical judgment without referencing the CDI query

Physician responses must reflect their own independent clinical judgment; 'per CDI' suggests the documentation may not meet compliance standards.

Question 61: What is the primary role of the CDS in ensuring accurate POA assignment?

To assign the final POA indicators on the claim form.
To perform concurrent record review and query for clarification on the timing of diagnoses. (Correct answer)
To diagnose conditions that were present on admission but missed by the physician.
To tell the physician which POA indicator to document.

Correct answer: To perform concurrent record review and query for clarification on the timing of diagnoses.

The CDS's main function is to improve the quality of clinical documentation. By performing concurrent reviews and querying physicians to clarify the onset, timing, and clinical indicators of conditions, the CDS ensures the record is clear for accurate POA assignment by the coder.

Question 62: When querying about the type of heart failure, which response option MUST always be included in a compliant multiple-choice query?

Congestive heart failure, unspecified
Clinically undetermined (Correct answer)
Normal cardiac function
Acute-on-chronic systolic heart failure

Correct answer: Clinically undetermined

Every compliant multiple-choice query must include 'clinically undetermined' to allow the physician to indicate that the condition cannot be specified.

Question 63: In the inpatient setting, which of the following conditions documented at discharge should be coded as if it existed?

Possible pneumonia (Correct answer)
Signs of dehydration
Condition ruled out during the stay
History of hypertension

Correct answer: Possible pneumonia

The UHDDS guideline for reporting uncertain diagnoses states that if the diagnosis documented at discharge is qualified as 'probable,' 'suspected,' 'likely,' etc., the condition should be coded as if it existed. This rule applies only to inpatient admissions.

Question 64: Which analysis technique helps CDI specialists identify the diagnoses most frequently missing from charts that result in lost DRG weight?

Root cause analysis of payer denials
Length of stay outlier analysis by service line
Physician scorecards ranking query volume by provider
DRG split analysis comparing actual versus expected CC/MCC rates by MS-DRG (Correct answer)

Correct answer: DRG split analysis comparing actual versus expected CC/MCC rates by MS-DRG

DRG split analysis compares a hospital's actual distribution across DRG pairs against expected distributions based on benchmark data, revealing which DRGs have unexpectedly high rates of 'without CC/MCC' assignment.

Question 65: Anoxic encephalopathy is most appropriately queried when a patient's chart documents which of the following clinical events?

A period of cardiac arrest or prolonged hypoxia followed by brain dysfunction (Correct answer)
Electrolyte imbalances such as hyponatremia
Thiamine deficiency in a chronic alcohol user
Systemic inflammatory response syndrome (SIRS) without a known source

Correct answer: A period of cardiac arrest or prolonged hypoxia followed by brain dysfunction

Anoxic encephalopathy results from insufficient oxygen delivery to the brain, most classically after cardiac arrest or a prolonged hypoxic event. Thiamine deficiency leads to Wernicke's; SIRS without infection leads to queries about metabolic causes; hyponatremia may cause metabolic encephalopathy.

Question 66: According to ICD-10-CM conventions, how are the terms 'acute kidney failure' and 'acute kidney injury' treated for coding purposes?

The terms are treated as equivalent and both are captured under the N17.x code category (Correct answer)
Acute kidney failure applies only when GFR drops below 15 mL/min
Acute kidney failure requires dialysis while AKI does not
Acute kidney failure is coded only when the patient requires ICU-level care

Correct answer: The terms are treated as equivalent and both are captured under the N17.x code category

ICD-10-CM treats 'acute kidney failure' and 'acute kidney injury' as clinically equivalent terms, both assigned to the N17.x category regardless of dialysis status.

Question 67: A Recovery Audit Contractor (RAC) denies payment for a sepsis claim. What is the FIRST step in the appeals process?

Recode the claim to a less complex DRG and resubmit
Request a Qualified Independent Contractor (QIC) review as the initial step
Submit a Redetermination request to the Medicare Administrative Contractor (MAC) within the allowed timeframe (Correct answer)
Self-disclose the underpayment to CMS immediately

Correct answer: Submit a Redetermination request to the Medicare Administrative Contractor (MAC) within the allowed timeframe

The Medicare appeals process begins with a Redetermination request submitted to the MAC within 120 days of the initial determination. This is the first level of appeal.

Question 68: In data analysis for CDI, 'specificity' of a coded diagnosis most directly affects:

The patient's length of stay
MS-DRG assignment and reimbursement accuracy (Correct answer)
Nursing staff workload
The number of queries issued per record

Correct answer: MS-DRG assignment and reimbursement accuracy

Diagnosis specificity determines the ICD-10-CM code selected, which drives MS-DRG grouping and corresponding reimbursement.

Question 69: A patient undergoes a total knee replacement and develops a deep vein thrombosis (DVT) on post-op day 3. Which documentation could potentially exclude this case from the PSI 12 (Perioperative Pulmonary Embolism or Deep Vein Thrombosis Rate) measure?

Documentation that the surgery was elective.
Documentation that the patient ambulated on post-op day 1.
Documentation that the patient received appropriate DVT prophylaxis.
Documentation of a history of DVT within the 30 days prior to admission. (Correct answer)

Correct answer: Documentation of a history of DVT within the 30 days prior to admission.

PSI 12 has specific exclusions. If a patient had a DVT within 30 days prior to admission, the post-operative DVT is not considered a new complication for the purposes of this quality measure. Clarifying this history is a key CDI role.

Question 70: A CCDS reviewer notices the cardiac surgery operative report describes a 'planned' CABG for three-vessel disease, but the discharge summary omits the vessel detail. What is the best course of action?

Code from the operative report alone since it is part of the medical record
Leave the CABG code unspecified and flag for the coding department
Code three-vessel CABG based on the pre-operative note and operative report
Issue a post-discharge query to the surgeon to document the number of vessels bypassed in the discharge summary (Correct answer)

Correct answer: Issue a post-discharge query to the surgeon to document the number of vessels bypassed in the discharge summary

While operative reports support coding, a query ensuring physician attestation in the final summary promotes completeness and compliance.

Question 71: A post-operative patient's creatinine rises from 1.0 to 1.6 mg/dL on day 2 after cardiac surgery. The surgeon documents 'mild renal dysfunction post-CABG.' What DRG impact does querying for AKI have?

AKI is only an CC, not an MCC, so the DRG impact is minimal
AKI qualifies as an MCC, potentially shifting the DRG and increasing reimbursement (Correct answer)
No impact; renal dysfunction and AKI map to the same DRG
Post-operative renal dysfunction always excludes AKI coding

Correct answer: AKI qualifies as an MCC, potentially shifting the DRG and increasing reimbursement

AKI (N17.9) is classified as an MCC (Major Complication/Comorbidity) in the MS-DRG system, which can significantly shift the DRG assignment and increase facility reimbursement compared to a nonspecific term.

Question 72: According to KDIGO criteria, Stage 1 AKI is defined as an increase in serum creatinine of at least how much within 48 hours?

0.5 mg/dL
1.0 mg/dL
0.1 mg/dL
0.3 mg/dL (Correct answer)

Correct answer: 0.3 mg/dL

KDIGO defines Stage 1 AKI as a serum creatinine increase of ≥0.3 mg/dL within 48 hours or ≥1.5 times the patient's baseline within 7 days.

Question 73: A patient on mechanical ventilation has a tracheostomy placed on day 5 of ventilation. The patient continues on the vent for a total of 14 days before being weaned. Which ICD-10-PCS codes are required?

One code for extended mechanical ventilation; tracheostomy is included in the vent code
No PCS codes are needed; mechanical ventilation is coded only through diagnosis codes
One code for tracheostomy only; mechanical ventilation is a nursing procedure not coded in PCS
Codes for both the tracheostomy procedure and mechanical ventilation performance (Correct answer)

Correct answer: Codes for both the tracheostomy procedure and mechanical ventilation performance

Both the tracheostomy procedure and mechanical ventilation performance require separate ICD-10-PCS codes. The tracheostomy is coded from the Medical and Surgical section, and mechanical ventilation is coded from Section 5.

Question 74: Under AHIMA's 2019 compliant query guidelines, which of the following must be included in every written query?

Physician's DEA number, patient insurance ID, and estimated MS-DRG impact
Patient name, account number or date of service, and the clinical indicators supporting the query (Correct answer)
A signature line for the physician to attest to medical necessity
The CDI specialist's credentials and the anticipated reimbursement change

Correct answer: Patient name, account number or date of service, and the clinical indicators supporting the query

AHIMA guidelines require patient identifiers, relevant clinical indicators, and a clear question with balanced response options.

Question 75: A physician documents 'urosepsis' as the discharge diagnosis. The CDI specialist queries the physician, who responds 'complicated urinary tract infection without systemic sepsis.' How should this be coded?

Code both 'urosepsis' and UTI as co-equal diagnoses
Code N39.0 with bacteremia code since complicated UTI implies bloodstream involvement
Code A41.9 (sepsis, unspecified) since the physician originally documented 'urosepsis'
Code N39.0 (UTI) or the appropriate complicated UTI code per the physician's clarification (Correct answer)

Correct answer: Code N39.0 (UTI) or the appropriate complicated UTI code per the physician's clarification

Following the physician's clarification that the clinical intent was complicated UTI without sepsis, the case is coded according to the physician's response. The original term 'urosepsis' is not coded as sepsis once clarified.

Question 76: A patient is admitted with decompensated heart failure and develops AKI from reduced renal perfusion. Which query format is most appropriate for the CDI specialist?

A multiple-choice compliant query offering pre-renal AKI, intrinsic AKI, and other clinically appropriate alternatives (Correct answer)
No query is needed since the etiology of AKI is clinically evident from the heart failure diagnosis
A yes/no query asking only if the patient has AKI
A leading query that directly suggests the AKI is cardiorenal syndrome caused by heart failure

Correct answer: A multiple-choice compliant query offering pre-renal AKI, intrinsic AKI, and other clinically appropriate alternatives

AHIMA and ACDIS guidelines require compliant queries to offer multiple clinically reasonable options without leading the provider toward a predetermined response.

Question 77: In a post-discharge CDI review, a specialist finds that septic shock was documented only in nursing notes but not by the physician. What is the appropriate action?

Code septic shock based on the nursing note documentation
Ignore the nursing note as it has no coding significance
Add septic shock to the secondary diagnosis list without a query
Query the physician post-discharge to clarify whether septic shock was present (Correct answer)

Correct answer: Query the physician post-discharge to clarify whether septic shock was present

Only physician or qualified provider documentation can be used as the basis for coding diagnoses. If septic shock is documented only in nursing notes, a post-discharge query to the attending or responsible physician is required.

Question 78: When documenting AKI secondary to rhabdomyolysis, which documentation elements are most critical for the CDS to ensure are present?

The CPK level and urine myoglobin results only
Only the AKI code is needed; rhabdomyolysis is assumed
Both rhabdomyolysis (M62.82) and AKI (N17.0) with a causal link documented by the physician (Correct answer)
The underlying cause of the rhabdomyolysis only

Correct answer: Both rhabdomyolysis (M62.82) and AKI (N17.0) with a causal link documented by the physician

Accurate coding requires the physician to document both conditions and their causal relationship; rhabdomyolysis-induced AKI most commonly maps to N17.0 (tubular necrosis) because myoglobin causes direct tubular damage.

Question 79: The Anti-Kickback Statute (AKS) is most directly relevant to CDI practice when:

A patient disputes a hospital bill and requests an itemized statement
A hospital offers financial incentives to physicians contingent on their documenting specific higher-weighted diagnoses (Correct answer)
A CDI specialist sends a compliant open-ended query to a physician about a missing secondary diagnosis
A coder assigns an incorrect principal diagnosis without physician query

Correct answer: A hospital offers financial incentives to physicians contingent on their documenting specific higher-weighted diagnoses

The AKS prohibits offering, paying, soliciting, or receiving anything of value to induce referrals or services covered by federal healthcare programs. Paying physicians bonuses tied to documenting diagnoses that increase reimbursement can be construed as a remuneration scheme that violates the AKS.

Question 80: Which OIG program provides annual guidance on high-risk healthcare compliance areas including CDI and coding?

CMS PEPPER reports
Medicare Administrative Contractor (MAC) Local Coverage Determinations
OIG Work Plan and annual compliance program guidance (Correct answer)
Recovery Audit Contractor (RAC) denial trend reports

Correct answer: OIG Work Plan and annual compliance program guidance

The OIG Work Plan, published annually, identifies high-risk areas for fraud and abuse including CDI-related issues such as inpatient admission criteria, DRG upcoding, and specific diagnosis documentation.

Question 81: Under the Sepsis-3 definition, what is the minimum SOFA score change required to define organ dysfunction in the context of suspected infection?

SOFA score increase of 2 or more points from baseline (Correct answer)
SOFA score increase of 1 point from baseline
SOFA score of 6 or greater with documented bacteremia
SOFA score of 4 or greater at any time

Correct answer: SOFA score increase of 2 or more points from baseline

The Sepsis-3 definition (2016) defines sepsis as life-threatening organ dysfunction caused by a dysregulated host response to infection, where organ dysfunction is operationally defined as a SOFA score increase of 2 or more points from baseline.

Question 82: A CDI specialist notices a physician documents 'urosepsis' in the record. Under ICD-10-CM coding guidelines, the appropriate next step is to:

Code to UTI and add a note that urosepsis was documented
Query the physician to clarify whether sepsis due to a urinary tract infection or UTI alone is intended (Correct answer)
Code urosepsis directly to sepsis since the terms are synonymous in ICD-10-CM
Escalate to the CMO because 'urosepsis' is a prohibited documentation term

Correct answer: Query the physician to clarify whether sepsis due to a urinary tract infection or UTI alone is intended

ICD-10-CM guidelines state that 'urosepsis' is not a codeable term and requires physician clarification to distinguish sepsis from UTI.

Question 83: Under the False Claims Act (FCA), which of the following scenarios could create liability for a hospital's CDI program?

Using concurrent review to identify documentation gaps before discharge
Systematically sending leading queries that result in diagnoses not clinically supported, then submitting claims (Correct answer)
Querying physicians about clinical indicators found in the medical record
Tracking query response rates and educating physicians on documentation specificity

Correct answer: Systematically sending leading queries that result in diagnoses not clinically supported, then submitting claims

Systematically sending leading or unsupported queries that result in non-clinically-supported diagnoses, then submitting Medicare claims for the resulting higher DRG, can constitute knowingly submitting false or fraudulent claims under the FCA.

Question 84: What does the term "clinical data mining" refer to?

Organizing data for billing purposes
Recording data from medical devices
Extracting and analyzing data from patient records to identify trends and patterns (Correct answer)
Collecting data from clinical trials

Correct answer: Extracting and analyzing data from patient records to identify trends and patterns

Clinical data mining involves the systematic process of extracting meaningful insights, trends, and patterns from large volumes of patient records and other clinical data. This technique uses statistical analysis and machine learning algorithms to uncover hidden relationships that can inform clinical decision-making, identify risk factors, improve treatment protocols, and enhance patient outcomes.

Question 85: When a physician responds to a query by selecting 'other — specify' and writes in a diagnosis, the CDI specialist should NEXT:

Escalate to the compliance department because write-in responses are inherently non-compliant
Return a second query asking the physician to choose one of the pre-listed options instead
Verify the written-in diagnosis is supported by the clinical documentation before coding it (Correct answer)
Code the written-in diagnosis immediately because the physician's response is always definitive

Correct answer: Verify the written-in diagnosis is supported by the clinical documentation before coding it

CDI specialists must confirm that any physician-specified diagnosis is clinically supported in the record before it is used for coding.

Question 86: Which of the following BEST describes the 'clinical validity' principle as it applies to compliant query formulation?

Clinical validity means the query format has been reviewed by the facility's legal counsel
A query is valid as long as it is signed by the attending physician within 48 hours of submission
A query is clinically valid when it results in an increased MS-DRG weight
A query should only be submitted when objective clinical evidence in the record supports the possibility of the condition being queried (Correct answer)

Correct answer: A query should only be submitted when objective clinical evidence in the record supports the possibility of the condition being queried

Clinical validity requires that queries be grounded in documented clinical evidence, not assumptions or financial motivations.

Question 87: When a CDI specialist conducts a 'triggered review,' what typically initiates the review?

Clinical criteria such as specific diagnoses, procedures, or LOS thresholds (Correct answer)
A denial letter from a payer
A random selection of charts for quality auditing purposes
A physician's request for documentation assistance

Correct answer: Clinical criteria such as specific diagnoses, procedures, or LOS thresholds

Triggered reviews are initiated by automated or manual flags based on specific clinical criteria such as ICU stays, certain diagnoses, high-cost procedures, or LOS outliers.

Question 88: A hospital uses APR-DRG Risk of Mortality (ROM) subclasses primarily for which of the following purposes?

Setting nurse-to-patient staffing ratios mandated by state law
Determining whether to admit a patient to the ICU
Calculating the hospital's Medicare case-mix index
Benchmarking observed versus expected mortality rates for quality reporting and risk adjustment (Correct answer)

Correct answer: Benchmarking observed versus expected mortality rates for quality reporting and risk adjustment

The ROM subclass predicts the likelihood that a patient will die during the hospitalization. Hospitals use it to risk-adjust mortality statistics — comparing observed deaths to the number expected given the patient population's ROM distribution — which is central to quality benchmarking and public reporting.

Question 89: What is the role of a Clinical Documentation Specialist (CDS) in healthcare documentation?

To oversee the scheduling of patient appointments
To directly provide patient care
To manage the hospital’s financial records
To enhance the accuracy and completeness of clinical documentation (Correct answer)

Correct answer: To enhance the accuracy and completeness of clinical documentation

The role of a Clinical Documentation Specialist (CDS) in healthcare documentation is to enhance its accuracy and completeness. CDS professionals review patient records to identify opportunities for improvement in documentation, ensuring that it precisely reflects the patient's severity of illness, risk of mortality, and the services rendered. This ultimately supports appropriate coding, accurate reimbursement, and improved quality reporting.

Question 90: When coding a patient who develops ventilator-associated pneumonia (VAP) during an ICU stay, which ICD-10-CM code is assigned?

J95.851 - Ventilator-associated pneumonia (Correct answer)
J15.9 - Unspecified bacterial pneumonia
J22 - Unspecified acute lower respiratory infection
J18.9 - Pneumonia, unspecified organism

Correct answer: J95.851 - Ventilator-associated pneumonia

J95.851 is the specific ICD-10-CM code for ventilator-associated pneumonia. It is a complication of care code and should only be assigned when the physician has documented VAP.

Question 91: From a CDI standpoint, why is specificity in HCC documentation critical for a Medicare Advantage population?

Specific diagnoses capture true disease burden, affecting capitation payments and ensuring the plan receives adequate funding to manage the patient's care (Correct answer)
HCC specificity only matters for surgical cases, not medical admissions
Specific diagnoses determine the patient's inpatient length of stay targets
HCC codes replace ICD-10-CM codes on the claim form for Medicare Advantage

Correct answer: Specific diagnoses capture true disease burden, affecting capitation payments and ensuring the plan receives adequate funding to manage the patient's care

Medicare Advantage plans receive risk-adjusted capitation payments from CMS based on the HCC profile of their enrollees. Under-documented diagnoses lead to lower risk scores, underpayment to the plan, and potentially inadequate resources for care management. Specificity directly links clinical accuracy to financial sustainability.

Question 92: A patient has hypertension and heart failure documented separately without linkage. What is the CDI specialist's best action?

Issue a compliant query to ask if the physician considers these conditions related (Correct answer)
Code only hypertension as the underlying etiology
Code only heart failure as the more clinically significant condition
Code them separately since each is documented as an independent condition

Correct answer: Issue a compliant query to ask if the physician considers these conditions related

ICD-10-CM presumes a causal relationship between hypertension and heart failure (combination code I11.0), but physician confirmation via query is required before assigning the combination code.

Question 93: A hospital's compliance audit finds that nearly all CDI queries result in documentation changes that increase DRG weight. What concern does this raise?

The query process may be leading or financially motivated, warranting a compliance review (Correct answer)
The CDI program is performing at peak efficiency
The coding staff needs additional training on DRG assignment
The hospital's payer mix likely skews toward more complex patients

Correct answer: The query process may be leading or financially motivated, warranting a compliance review

If nearly all queries result in DRG-increasing documentation changes, it may indicate that queries are being formulated in a leading manner or are clinically unjustified.

Question 94: Which of the following would be considered a reportable secondary diagnosis?

A resolved case of pneumonia from two years ago.
Chronic hypertension managed with home medications that are continued during the stay. (Correct answer)
A condition mentioned in the ED note but not addressed again.
A family history of colon cancer.

Correct answer: Chronic hypertension managed with home medications that are continued during the stay.

According to UHDDS, a secondary diagnosis is a condition that coexists at admission or develops subsequently, and affects patient care in terms of requiring clinical evaluation, therapeutic treatment, diagnostic procedures, extended length of stay, or increased nursing care/monitoring.

Question 95: Which action by a CDI specialist most likely constitutes 'query harassment' under professional guidelines?

Sending a query that covers two related conditions on the same form
Querying a physician about a diagnosis that appears in only one progress note
Sending repeated queries to the same physician on the same encounter after receiving a 'clinically undetermined' response (Correct answer)
Using a query template that was not approved by the facility's compliance committee

Correct answer: Sending repeated queries to the same physician on the same encounter after receiving a 'clinically undetermined' response

Requerying a physician on the same issue after receiving a valid 'clinically undetermined' response is considered query harassment and is non-compliant.

Question 96: A patient is admitted with chest pain and subsequently diagnosed with NSTEMI. How should the documentation reflect the principal diagnosis?

Chest pain, since it was the presenting complaint
Both chest pain and NSTEMI as co-principal diagnoses
NSTEMI, as the condition established after study (Correct answer)
Unstable angina, as the default cardiac admission diagnosis

Correct answer: NSTEMI, as the condition established after study

Once the definitive diagnosis of NSTEMI is established after study, it replaces the presenting symptom (chest pain) as the principal diagnosis per UHDDS guidelines.

Question 97: A patient with CKD Stage 3 (baseline creatinine 1.8 mg/dL) presents with creatinine of 3.2 mg/dL. The physician documents 'CKD Stage 3 with acute exacerbation.' What is the best CDS action?

Code only CKD Stage 3 as documented
Downgrade to CKD Stage 4 based on current creatinine
Code acute renal failure and CKD Stage 3
Query whether AKI on CKD should be documented, as the creatinine rise exceeds 1.5x baseline (Correct answer)

Correct answer: Query whether AKI on CKD should be documented, as the creatinine rise exceeds 1.5x baseline

The creatinine rise from 1.8 to 3.2 mg/dL represents a >1.5x increase meeting AKI criteria; querying for AKI on CKD ensures accurate coding and higher DRG specificity.

Question 98: According to ASPEN/AND diagnostic criteria, which finding is required to diagnose malnutrition in any clinical setting?

Inadequate energy intake as a mandatory criterion (Correct answer)
BMI below 18.5 kg/m2
Serum albumin below 3.0 g/dL
Unintentional weight loss exceeding 10% of body weight

Correct answer: Inadequate energy intake as a mandatory criterion

The ASPEN/AND 2012 consensus statement requires inadequate energy intake as a mandatory criterion for malnutrition diagnosis in all contexts, combined with at least one additional criterion.

Question 99: Which type of encephalopathy is most directly associated with systemic infection causing brain dysfunction in the absence of a central nervous system infection?

Septic encephalopathy (Correct answer)
Hepatic encephalopathy
Hypertensive encephalopathy
Anoxic encephalopathy

Correct answer: Septic encephalopathy

Septic encephalopathy (also called sepsis-associated encephalopathy) is brain dysfunction caused by the systemic inflammatory response to infection — without direct infection of the CNS. It is distinct from meningitis or encephalitis and is a clinically significant and documentable condition.

Question 100: Which of the following conditions is on the CMS list of Hospital-Acquired Conditions (HACs) that can lead to a payment reduction if not POA?

Ventilator-associated pneumonia
Falls and trauma (e.g., fracture) acquired during the stay (Correct answer)
Acute myocardial infarction occurring post-operatively
Community-acquired pneumonia

Correct answer: Falls and trauma (e.g., fracture) acquired during the stay

The CMS HAC list includes specific, preventable conditions. A fall and trauma, such as a fracture or dislocation, that occurs after admission is a listed HAC, as are Stage 3 and 4 pressure ulcers and certain surgical site infections.

Question 101: When analyzing physician query agreement rates, a CDS specialist notes that one physician has a 95% agreement rate while the department average is 72%. This finding most likely indicates:

Queries to this physician may be leading or overly directive (Correct answer)
The physician has excellent documentation skills
The physician should be excluded from future query data
The department average is unreliable

Correct answer: Queries to this physician may be leading or overly directive

An unusually high agreement rate may signal that queries are written in a leading manner, prompting compliance concerns.

Question 102: In the CMS-HCC model, a patient's chronic conditions must be re-documented each plan year to be included in the risk score. This requirement is best described as:

Prospective documentation
Concurrent review
Hierarchical condition coding
Annual recapture (Correct answer)

Correct answer: Annual recapture

Annual recapture means that HCCs do not carry forward automatically from prior years — each condition must be documented in the current measurement year for it to affect the risk score. This drives the CDI and coding focus on re-documenting chronic conditions at every relevant encounter.

Question 103: Which of the following best explains the 'hierarchical' principle in the HCC model?

HCC codes rank diagnoses chronologically by date of first diagnosis
Physicians must document diagnoses in order of clinical priority within the encounter
Each HCC maps to exactly one MS-DRG grouper category
Within a disease category, only the most severe condition is counted; less severe conditions in the same category are suppressed (Correct answer)

Correct answer: Within a disease category, only the most severe condition is counted; less severe conditions in the same category are suppressed

The hierarchical structure ensures that a patient with metastatic cancer does not also receive an HCC credit for localized cancer of the same type — only the highest-severity condition within a disease hierarchy is counted. This prevents 'double-counting' of related conditions.

Question 104: A CDI analyst notices CMI increased coinciding with a new CDI program implementation. Which additional data point would BEST confirm that CDI activities drove the CMI improvement?

Total Medicare discharge volume for both years
Hospital bed expansion records from the same period
Physician credentialing records showing new specialist hires
CC/MCC capture rate and query impact data from CDI tracking software (Correct answer)

Correct answer: CC/MCC capture rate and query impact data from CDI tracking software

CC/MCC capture rate changes and CDI query impact data directly link documentation improvements to the CMI increase.

Question 105: Which MS-DRG grouping concept refers to a secondary diagnosis that increases the severity of illness and resource use, elevating DRG assignment?

Complication or Comorbidity (CC) (Correct answer)
Principal diagnosis
Hierarchical Condition Category (HCC)
Present on Admission (POA) indicator

Correct answer: Complication or Comorbidity (CC)

A Complication or Comorbidity (CC) or Major CC (MCC) is a secondary diagnosis that increases DRG weight and reimbursement under the IPPS system.

Question 106: A patient is admitted for acute pancreatitis and subsequently requires a Whipple procedure for a newly discovered pancreatic mass. How should the principal diagnosis and principal procedure be assigned?

Principal diagnosis: pancreatic mass; principal procedure: biopsy only
Principal diagnosis: pancreatic mass; principal procedure: Whipple procedure
Principal diagnosis: pancreatitis; principal procedure: Whipple procedure (Correct answer)
Principal diagnosis: pancreatitis; principal procedure: none (diagnostic only)

Correct answer: Principal diagnosis: pancreatitis; principal procedure: Whipple procedure

The principal diagnosis remains acute pancreatitis, the condition established after study to be chiefly responsible for the admission. The Whipple procedure is the principal procedure as the definitive therapeutic surgical procedure performed during the stay.

Question 107: Which of the following represents the BEST practice for a CDI specialist when a physician's query response is received after the claim has already been submitted?

Work with coding and billing to amend the claim if the response changes the coded diagnoses (Correct answer)
Discard the query response since the claim is already submitted
File the response as an addendum but do not update the coded claim
Retroactively change the DRG without amending the medical record

Correct answer: Work with coding and billing to amend the claim if the response changes the coded diagnoses

If a physician query response changes the diagnosis coding after claim submission, the appropriate action is to amend the medical record with the physician's addendum and work with coding and billing to submit a corrected claim.

Question 108: A hospital's readmission rate for heart failure is 22%, above the national average of 18%. To determine whether documentation or clinical care is the primary driver, a CDS specialist should first:

Analyze whether the patient population's risk factors are accurately documented and captured in risk-adjustment models (Correct answer)
Query all attending physicians on heart failure cases
Reduce the number of heart failure admissions
Switch the EHR system to improve documentation capture

Correct answer: Analyze whether the patient population's risk factors are accurately documented and captured in risk-adjustment models

Risk-adjustment models depend on complete documentation of comorbidities; poor capture can make outcomes appear worse than actual clinical performance.

Question 109: A CDS program tracks 'initial query rate' as the number of queries issued divided by the number of records reviewed. This metric primarily measures:

Documentation opportunity identification (Correct answer)
Physician compliance
Coder productivity
Program efficiency

Correct answer: Documentation opportunity identification

The initial query rate reflects how often reviewers identify a documentation opportunity requiring clarification per record reviewed.

Question 110: A CDS reviews a record with clinical indicators of sepsis (fever, tachycardia, leukocytosis, and a positive blood culture) but the physician has only documented 'UTI'. Which query statement is the most compliant?

Per sepsis-3 criteria, this patient meets the definition. Please clarify the diagnosis.
Based on the documented fever, tachycardia, leukocytosis, and positive blood culture, can you please clarify a diagnosis that represents these findings? (Correct answer)
Do you agree the patient has sepsis secondary to UTI based on the fever, tachycardia, and positive blood culture?
Please document sepsis as it is clearly supported by the clinical evidence in the chart.

Correct answer: Based on the documented fever, tachycardia, leukocytosis, and positive blood culture, can you please clarify a diagnosis that represents these findings?

This query is compliant because it presents the objective clinical indicators from the record and asks the physician to provide a diagnosis based on their professional judgment without leading them to a specific answer. Options A and C are leading, and option B introduces information not present in the scenario.

Question 111: According to AHIMA/ACDIS query practice guidelines, which of the following query formats is MOST compliant?

A yes/no query asking 'Does this patient have sepsis?'
A multiple-choice query offering clinically appropriate diagnoses plus 'other' and 'clinically undetermined' (Correct answer)
A verbal query with no documentation in the medical record
A query that states 'Please document sepsis to support the ICD-10 code'

Correct answer: A multiple-choice query offering clinically appropriate diagnoses plus 'other' and 'clinically undetermined'

AHIMA/ACDIS guidelines require non-leading queries that offer balanced clinical options. Multiple-choice formats listing plausible diagnoses plus 'other' and 'clinically undetermined' meet this standard.

Question 112: According to the UHDDS definition, the principal procedure is one that is performed for:

Prophylactic purposes to prevent a future condition.
The most resource-intensive purpose, regardless of intent.
Diagnostic purposes to find the underlying problem.
Definitive treatment of a condition. (Correct answer)

Correct answer: Definitive treatment of a condition.

The principal procedure is performed for definitive treatment of the principal diagnosis, rather than for diagnostic or exploratory purposes. A diagnostic procedure is only selected as principal if no therapeutic procedure was performed.

Question 113: Which MS-DRG grouping logic feature allows a single DRG to shift to a higher-weighted DRG when a qualifying OR procedure is present?

MDC assignment
Procedure intensity scoring
OR procedure designation (Correct answer)
CC/MCC subclassification

Correct answer: OR procedure designation

OR (operating room) procedure designation triggers MS-DRG logic to route a case to surgical DRGs, which typically carry higher relative weights than medical DRGs.

Question 114: A patient is admitted for pneumonia and also undergoes a screening colonoscopy during the stay, which was scheduled prior to admission. Which statement is correct regarding principal procedure selection?

There is no principal procedure as it was unrelated to the admission's principal diagnosis. (Correct answer)
The most expensive procedure performed is always the principal procedure.
The chest X-ray for pneumonia is the principal procedure.
The colonoscopy is the principal procedure because it is an invasive procedure.

Correct answer: There is no principal procedure as it was unrelated to the admission's principal diagnosis.

The colonoscopy is unrelated to the reason for admission (pneumonia). Therefore, there is no principal procedure for this encounter, and the case will be assigned a medical MS-DRG based on the pneumonia diagnosis.

Question 115: A hospitalist documents 'possible CHF exacerbation, probable pneumonia' in the discharge summary. How should the final codes reflect this?

Code only 'pneumonia' as it is the more specific of the two diagnoses
Code both CHF exacerbation and pneumonia per the inpatient uncertain diagnosis guideline (Correct answer)
Code only the condition that results in the higher DRG
Code neither condition since both are uncertain

Correct answer: Code both CHF exacerbation and pneumonia per the inpatient uncertain diagnosis guideline

Under ICD-10-CM inpatient guidelines (Section II), conditions documented as 'possible,' 'probable,' or similar uncertain terms at the time of discharge are coded as if established. Both CHF exacerbation and pneumonia meet this standard and should be coded.

Question 116: A CDI specialist documents in the query that clarifying a diagnosis to 'acute kidney injury' will increase reimbursement by $4,000. This practice is:

Non-compliant only if the amount exceeds $1,000 under OIG guidelines
Compliant because transparency about reimbursement supports accurate coding
Non-compliant because queries must not reference financial impact or DRG changes (Correct answer)
Compliant if the physician is also informed of the clinical rationale

Correct answer: Non-compliant because queries must not reference financial impact or DRG changes

Including financial impact or DRG information in a query is non-compliant and can constitute improper influence on physician documentation.

Question 117: According to KDIGO urine output criteria, which finding is consistent with Stage 2 AKI?

Less than 0.5 mL/kg/hr for more than 12 hours (Correct answer)
Less than 0.5 mL/kg/hr for more than 6 hours
Less than 0.3 mL/kg/hr for more than 24 hours
Anuria for 12 or more hours

Correct answer: Less than 0.5 mL/kg/hr for more than 12 hours

KDIGO Stage 2 AKI by urine output is defined as less than 0.5 mL/kg/hr for more than 12 consecutive hours.

Question 118: A CDI specialist reviews a case where a patient undergoes CABG using a saphenous vein graft harvested from the left leg. How many ICD-10-PCS codes are required at minimum?

One code for the bypass only
Two codes: one for the bypass and one for the vein harvest (Correct answer)
Three codes: bypass, vein harvest, and cardiopulmonary bypass
One code with device character capturing the autologous venous graft

Correct answer: Two codes: one for the bypass and one for the vein harvest

When a conduit is harvested from a different anatomical site than the bypass site, ICD-10-PCS requires a separate code for the harvest procedure. The CABG bypass code and the saphenous vein excision harvest code are both required.

Question 119: When calculating the Observed-to-Expected (O/E) mortality ratio, a ratio greater than 1.0 indicates:

The hospital's mortality is worse than expected (Correct answer)
The hospital's mortality is better than expected
The hospital has a higher CMI than the national average
Documentation is complete and accurate

Correct answer: The hospital's mortality is worse than expected

An O/E ratio above 1.0 means the hospital's actual observed mortality exceeded the risk-adjusted expected mortality, suggesting potential quality concerns.

Question 120: A patient with Type 2 diabetes is admitted for a diabetic foot ulcer. The record documents the ulcer extends to bone. Which ICD-10-CM code best captures the depth?

L97.504 - Non-pressure chronic ulcer of other part of foot with necrosis of bone (Correct answer)
E11.621 - Type 2 diabetes mellitus with foot ulcer
L97.503 - Non-pressure chronic ulcer of other part of foot with necrosis of muscle
L97.509 - Non-pressure chronic ulcer of other part of foot, unspecified severity

Correct answer: L97.504 - Non-pressure chronic ulcer of other part of foot with necrosis of bone

When an ulcer extends to bone, ICD-10-CM provides a specific code indicating necrosis of bone. This level of specificity is important for capturing the full severity of the condition.

Question 121: Under ICD-10-PCS, which character position represents the body part in a Medical and Surgical section procedure?

Character 6
Character 3
Character 5
Character 4 (Correct answer)

Correct answer: Character 4

In ICD-10-PCS Medical and Surgical section, character 4 represents the body part involved in the procedure.

Question 122: A CDI specialist notices the hospital's Case Mix Index (CMI) dropped after a coding software update. What is the MOST likely explanation?

Increased patient volume lowered the average
Higher-severity DRGs are being under-coded due to documentation gaps (Correct answer)
CMI calculations changed under the new fiscal year
The hospital admitted fewer complex patients

Correct answer: Higher-severity DRGs are being under-coded due to documentation gaps

A drop in CMI typically signals that high-severity DRGs are not being captured, often because documentation does not support the specificity needed to assign more resource-intensive DRGs.

Question 123: Why is documenting 'toxic metabolic encephalopathy' (TME) clinically superior to 'altered mental status' from a CDI perspective?

TME qualifies as a major complication or comorbidity (MCC), while AMS does not, affecting MS-DRG assignment (Correct answer)
TME carries a lower POA burden than AMS
TME is excluded from HAC reporting, reducing quality penalties
TME documentation shortens the required length of stay for reimbursement

Correct answer: TME qualifies as a major complication or comorbidity (MCC), while AMS does not, affecting MS-DRG assignment

Toxic metabolic encephalopathy maps to an MCC under ICD-10-CM, which can significantly impact the MS-DRG weight and reimbursement. 'Altered mental status' is a symptom code that does not carry MCC status, leaving clinical complexity uncaptured.

Question 124: A CDI specialist at a hospital that contracts with a Medicaid managed care organization notices that a patient's chart lacks documentation of a significant comorbidity. In the APR-DRG context, failing to document this comorbidity most directly risks:

Triggering a False Claims Act investigation for upcoding
Lowering the SOI subclass assignment, reducing the expected resource weight and reimbursement (Correct answer)
Causing the case to be grouped under a Medicare MS-DRG instead
Increasing the patient's POA indicator burden

Correct answer: Lowering the SOI subclass assignment, reducing the expected resource weight and reimbursement

In APR-DRGs, undocumented comorbidities cannot be captured by the grouper, which may result in a lower SOI subclass (e.g., Moderate instead of Major). This understates clinical complexity, reduces the relative weight of the DRG, and results in underpayment — the opposite of upcoding concerns.

Question 125: What is the primary goal of a CDI mortality review?

To ensure the final coded data accurately reflects the patient's severity of illness and risk of mortality. (Correct answer)
To communicate with the patient's family about the hospital stay.
To assign blame for any potential medical errors.
To determine the cause of death for the death certificate.

Correct answer: To ensure the final coded data accurately reflects the patient's severity of illness and risk of mortality.

The main purpose of a mortality review from a CDI perspective is to ensure the documentation fully captures all active conditions and their severity. This leads to accurate coding that reflects the patient's true severity of illness (SOI) and risk of mortality (ROM), which is crucial for risk-adjusted mortality metrics.

Question 126: A pressure ulcer is documented as 'healed' at discharge. How should this be coded per ICD-10-CM guidelines?

Assign a code for healed pressure ulcer in category L89 with stage 0
Do not assign a pressure ulcer code; there is no code for a healed pressure ulcer (Correct answer)
Code as unstageable since it is resolved
Code the highest stage the ulcer reached during admission

Correct answer: Do not assign a pressure ulcer code; there is no code for a healed pressure ulcer

Per ICD-10-CM official guidelines, no code is assigned for a pressure ulcer documented as healed at the time of discharge.

Question 127: APR-DRGs differ most fundamentally from MS-DRGs in that APR-DRGs:

Do not account for secondary diagnoses when grouping cases
Assign independent Severity of Illness (SOI) and Risk of Mortality (ROM) subclasses in addition to the base DRG (Correct answer)
Apply only to pediatric and neonatal patient populations
Are administered exclusively by CMS for Medicare Fee-for-Service inpatients

Correct answer: Assign independent Severity of Illness (SOI) and Risk of Mortality (ROM) subclasses in addition to the base DRG

APR-DRGs (All Patient Refined DRGs), developed by 3M, layer two additional dimensions — Severity of Illness and Risk of Mortality — each rated on a 1–4 scale. This provides more granular clinical complexity measurement than MS-DRGs, which only differentiate by MCC/CC/no CC.

Question 128: Under the Uniform Hospital Discharge Data Set (UHDDS), the principal diagnosis is defined as the condition established after study to be chiefly responsible for what?

Generating the highest MS-DRG weight
The patient's longest length of stay
The highest-cost procedure performed
Occasioning the admission to the hospital (Correct answer)

Correct answer: Occasioning the admission to the hospital

UHDDS defines the principal diagnosis as the condition established after study to be chiefly responsible for occasioning the patient's admission.

Question 129: What is a critical requirement for documenting a verbal query?

The CDS should simply remember the conversation and inform the coder of the physician's answer.
The CDS must record the conversation on a mobile device for future reference.
The CDS must send a follow-up email to the physician summarizing the conversation.
The CDS must document the question, clinical indicators, and the physician's response in the health record for the physician to sign. (Correct answer)

Correct answer: The CDS must document the question, clinical indicators, and the physician's response in the health record for the physician to sign.

For a verbal interaction to be considered a compliant query, it must be documented in the permanent health record. This documentation should include the question asked, the clinical indicators discussed, the physician's response, and the date/time, followed by the physician's signature or attestation.

Question 130: What does the clinical term 'acute-on-chronic kidney disease' indicate for ICD-10-CM coding purposes?

A temporary improvement in CKD function following treatment
A patient with CKD who has never experienced an acute kidney episode
CKD that has recently advanced to a higher stage without an acute episode
AKI superimposed on pre-existing CKD, requiring codes for both conditions (Correct answer)

Correct answer: AKI superimposed on pre-existing CKD, requiring codes for both conditions

Acute-on-chronic kidney disease indicates AKI has developed in a patient with underlying CKD; ICD-10-CM requires assigning codes for both AKI (N17.x) and the appropriate CKD stage (N18.x).

Question 131: A CDI specialist reviews a case where a patient with known cancer is admitted with fever, hypotension, and positive blood cultures. The oncologist documents 'febrile neutropenia.' What additional query should be considered?

Do not query since febrile neutropenia is an adequate sepsis equivalent for coding purposes
Query for severe sepsis only if the patient required ICU transfer
Query for sepsis if SOFA criteria for organ dysfunction are met alongside the documented infection (Correct answer)
Query only for MRSA bacteremia since cancer patients are high risk

Correct answer: Query for sepsis if SOFA criteria for organ dysfunction are met alongside the documented infection

Febrile neutropenia is a clinical syndrome but not synonymous with sepsis in ICD-10-CM. If the patient meets Sepsis-3 criteria (documented infection plus organ dysfunction with a SOFA increase of 2 or more points), the CDI specialist should query the oncologist to clarify whether sepsis is present.

Question 132: Which type of payer most commonly uses APR-DRGs as the basis for hospital reimbursement?

Workers' compensation programs only
Critical Access Hospitals under cost-based reimbursement
Medicaid programs and commercial (non-Medicare) payers in many states (Correct answer)
Medicare Fee-for-Service exclusively

Correct answer: Medicaid programs and commercial (non-Medicare) payers in many states

APR-DRGs were designed to cover all patient types — not just Medicare — and are widely adopted by state Medicaid programs and commercial insurers. Medicare FFS uses MS-DRGs; Critical Access Hospitals use cost-based reimbursement; workers' compensation uses fee schedules.

Question 133: A patient is admitted with AKI and recovers renal function before discharge. The discharge summary states 'resolved AKI.' How should this be coded?

Code only the underlying cause of the AKI
Code AKI as a secondary diagnosis because it was present and treated during the encounter (Correct answer)
Code as history of AKI using a Z code
Do not code AKI since it resolved before discharge

Correct answer: Code AKI as a secondary diagnosis because it was present and treated during the encounter

Conditions that are diagnosed and treated during the hospitalization are coded even if resolved at discharge, as they affected patient care and management during the encounter.

Question 134: A patient develops a catheter-associated urinary tract infection (CAUTI) on the third day of their hospital stay. What is the correct Present on Admission (POA) indicator for this diagnosis?

U (Unknown, documentation insufficient)
W (Clinically undetermined)
N (No, not present on admission) (Correct answer)
Y (Yes, present on admission)

Correct answer: N (No, not present on admission)

The POA indicator 'N' signifies that the condition was not present at the time of inpatient admission. Since the CAUTI developed after admission, 'N' is the correct indicator.

Question 135: A patient with end-stage COPD is admitted with pneumonia. The physician documents 'acute on chronic respiratory failure'. To ensure proper coding and sequencing, what should the CDS query for?

Clarification of the linkage, specifically if the acute respiratory failure is due to the pneumonia. (Correct answer)
The date of the patient's last pulmonary function test.
Whether the acute respiratory failure is hypoxic or hypercapnic.
The patient's baseline oxygen saturation.

Correct answer: Clarification of the linkage, specifically if the acute respiratory failure is due to the pneumonia.

For coding purposes, it is critical to link the acute respiratory failure to its cause. While the COPD is the underlying chronic condition, the pneumonia is the acute event that precipitated the decompensation. Linking the acute respiratory failure to the pneumonia is the most specific and accurate representation of the admission.

Question 136: Which ICD-10-CM code is assigned for end-stage renal disease (ESRD) requiring renal replacement therapy?

N19
N18.5
N17.9
N18.6 (Correct answer)

Correct answer: N18.6

N18.6 is the specific ICD-10-CM code for ESRD, which is distinct from N18.5 (CKD Stage 5) and indicates dependency on dialysis or other renal replacement therapy.

Question 137: Per ICD-10-CM Official Guidelines, which of the following correctly describes coding for pressure ulcers with multiple stages documented at the same site over the course of an inpatient stay?

Code the stage present at discharge only
Code the highest stage documented during the stay (Correct answer)
Code each stage separately with distinct codes
Code only the stage present on admission

Correct answer: Code the highest stage documented during the stay

When a pressure ulcer progresses during admission, ICD-10-CM guidelines direct assignment of the code for the highest stage documented during the stay.

Question 138: A patient is admitted for an open femur fracture and undergoes an open reduction internal fixation (ORIF). During the hospital stay, they develop respiratory failure and require an emergency intubation and mechanical ventilation. What is the principal procedure?

There are two principal procedures in this case.
Open reduction internal fixation (ORIF). (Correct answer)
Mechanical ventilation.
Intubation, because it was life-saving.

Correct answer: Open reduction internal fixation (ORIF).

The ORIF was performed to treat the principal diagnosis (femur fracture), which was the reason for the admission. The intubation was performed to treat a complication that arose later. Therefore, the ORIF is the principal procedure.

Question 139: When two surgical procedures are performed and either could serve as the principal procedure, what does the UHDDS guideline recommend?

Code both and let the grouper decide automatically
The facility may sequence them in any order, and the grouper selects the DRG with the highest weight (Correct answer)
Always select the procedure with the longer operative time
Select the procedure with the higher relative weight

Correct answer: The facility may sequence them in any order, and the grouper selects the DRG with the highest weight

UHDDS guidelines allow facilities to sequence multiple qualifying procedures in any order; the MS-DRG grouper evaluates all coded procedures and assigns the DRG that results in the highest relative weight.

Question 140: A patient with type 2 diabetes mellitus is documented with CKD Stage 3b. What is the correct ICD-10-CM coding approach?

Assign only E11.9 since diabetes is the underlying cause
Assign E11.9 and N18.32 as unrelated diagnoses
Assign only N18.32 since CKD is the complicating condition
Assign E11.22 for diabetic chronic kidney disease plus N18.32 for the specific CKD stage (Correct answer)

Correct answer: Assign E11.22 for diabetic chronic kidney disease plus N18.32 for the specific CKD stage

ICD-10-CM requires E11.22 (type 2 DM with diabetic CKD) paired with N18.32 (CKD Stage 3b) to capture both the diabetic etiology and the specific stage of CKD.

CCDS Exam

The Certified Clinical Documentation Specialist (CCDS) exam, administered by ACDIS, validates expertise in clinical documentation improvement including coding, query practices, data analytics, and regulatory compliance.

140

Questions

210 min

Time Limit

73%

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