CCDS Acute Kidney Injury and Renal Documentation 3

Question 1

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

Accepted Answer

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

Answer

Acute kidney failure requires dialysis while AKI does not

Answer

Acute kidney failure applies only when GFR drops below 15 mL/min

Answer

Acute kidney failure is coded only when the patient requires ICU-level care

Question 2

A CDI specialist notices a patient receiving continuous renal replacement therapy (CRRT). What documentation query is most critical if not already present?

Accepted Answer

Specification of AKI Stage 3, since initiation of renal replacement therapy is a defining KDIGO criterion

Answer

The type of vascular access device used for CRRT

Answer

The physician's rationale for choosing CRRT over intermittent hemodialysis

Answer

The number of CRRT sessions completed during the admission

Question 3

A patient's discharge summary documents 'acute renal failure' and the medical record contains clinical evidence supporting KDIGO Stage 2 AKI. What is the appropriate CDI action?

Accepted Answer

Query the physician to specify the AKI stage for more accurate and specific code assignment

Answer

Code acute renal failure (N17.9) without further clarification

Answer

Assign the lowest AKI stage to remain conservative in documentation

Answer

Disregard staging since it does not affect reimbursement

Question 4

When a nephrologist documents 'worsening renal function' without a specific diagnosis, what is the CDI specialist's most appropriate response?

Accepted Answer

Issue a compliant query to clarify whether AKI or CKD exacerbation is the clinical diagnosis

Answer

Assign code N28.9 (disorder of kidney and ureter, unspecified) without querying

Answer

Ignore the documentation since 'worsening renal function' is not a codeable condition

Answer

Code CKD at the most recent stage documented in prior records

Question 5

What is the primary significance of establishing a patient's baseline creatinine in AKI documentation for CDI purposes?

Accepted Answer

It establishes the reference point required to apply KDIGO AKI staging criteria accurately

Answer

It is irrelevant since only the peak creatinine value determines AKI severity

Answer

Baseline creatinine is used exclusively for CKD staging, not AKI assessment

Answer

CDI specialists are not permitted to use baseline creatinine when evaluating AKI staging

Question 6

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?

Accepted Answer

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

Answer

A leading query that directly suggests the AKI is cardiorenal syndrome caused by heart failure

Answer

A yes/no query asking only if the patient has AKI

Answer

No query is needed since the etiology of AKI is clinically evident from the heart failure diagnosis

Question 7

Which documented condition, if present alongside AKI, would most likely result in an MS-DRG upgrade reflecting greater patient resource intensity?

Accepted Answer

Acute kidney injury with tubular necrosis, classified as an MCC

Answer

Asymptomatic urinary tract infection

Answer

Urinary retention requiring catheterization

Answer

Incidental asymptomatic hematuria