Certified Medical Coding Specialist Research & Evidence-Based Practice 3 — Questions and Answers
Question 1: A retrospective chart audit examines 500 records to identify patterns in missed secondary diagnoses. The primary purpose of this audit type in coding research is to:
- Predict future coding trends
- Analyze existing data without altering past records (Correct answer)
- Randomize coding assignments for comparison
- Prospectively collect new clinical data
Correct answer: Analyze existing data without altering past records
Retrospective studies analyze already-existing data, making them efficient for identifying historical patterns without affecting past documentation.
Question 2: Which coding guidance resource should a coder consult to clarify the correct sequencing of diagnoses for a complex inpatient case with multiple comorbidities?
- CPT Assistant
- AHA Coding Clinic for ICD-10-CM/PCS (Correct answer)
- Medicare Claims Processing Manual Chapter 12
- NCCI Policy Manual
Correct answer: AHA Coding Clinic for ICD-10-CM/PCS
AHA Coding Clinic for ICD-10-CM/PCS provides official guidance on diagnosis sequencing and complex inpatient coding scenarios.
Question 3: A research team calculates the positive predictive value (PPV) of an algorithm that flags potentially miscoded DRGs. PPV measures which of the following?
- The proportion of actual errors the algorithm correctly identifies
- The proportion of algorithm flags that are true errors (Correct answer)
- The overall accuracy of the algorithm
- The rate of false negatives in the dataset
Correct answer: The proportion of algorithm flags that are true errors
Positive predictive value is the proportion of positive test results (flags) that are true positives (actual errors).
Question 4: A medical coding department implements changes based on a systematic review of coding accuracy studies. This approach exemplifies which practice concept?
- Quality assurance auditing
- Evidence-based coding practice (Correct answer)
- Prospective payment compliance
- Utilization management
Correct answer: Evidence-based coding practice
Applying findings from systematic research to inform coding practices and decisions is the definition of evidence-based coding practice.
Question 5: A chi-square test is used in a coding accuracy study comparing error rates between two facilities. This test is used because the outcome variable is:
- Continuous and normally distributed
- Categorical (correct vs. incorrect codes) (Correct answer)
- Ranked on an ordinal scale
- Time-to-event data
Correct answer: Categorical (correct vs. incorrect codes)
Chi-square tests compare distributions of categorical variables, such as whether a code was correct or incorrect.
Question 6: When evaluating the quality of a coding research article, which element of the PICO framework represents the target group being studied?
- P — Population/Patient (Correct answer)
- I — Intervention
- C — Comparison
- O — Outcome
Correct answer: P — Population/Patient
In PICO, 'P' refers to the Population or Patient group that is the focus of the clinical question or study.
Question 7: A hospital uses encoder software that suggests codes based on clinical terminology in physician notes. A study evaluating this tool's accuracy would BEST measure which outcome?
- Time to code submission
- Concordance between encoder-suggested and manually assigned codes (Correct answer)
- Physician documentation completeness
- Coder satisfaction scores
Correct answer: Concordance between encoder-suggested and manually assigned codes
Comparing encoder-suggested codes to expert-assigned codes (concordance rate) directly measures the tool's coding accuracy.
Certified Medical Coding Specialist Research & Evidence-Based Practice 3
A retrospective chart audit examines 500 records to identify patterns in missed secondary diagnoses.
The primary purpose of this audit type in coding research is to: