Certified Medical Coding Specialist Research & Evidence-Based Practice 2 — Questions and Answers
Question 1: A medical coder reviews a clinical study comparing ICD-10-CM coding accuracy between two hospital systems. This type of study is best classified as which research design?
- Randomized controlled trial
- Comparative observational study (Correct answer)
- Case report
- Systematic review
Correct answer: Comparative observational study
Comparing outcomes between two existing groups without random assignment is an observational comparative study design.
Question 2: Which statistical measure best indicates the consistency of coding decisions made by the same coder at two different times?
- Cohen's kappa
- Intra-rater reliability (Correct answer)
- Pearson correlation
- Sensitivity
Correct answer: Intra-rater reliability
Intra-rater reliability measures how consistently a single coder assigns codes when reviewing the same records at different points in time.
Question 3: A hospital's compliance department wants to evaluate whether a new coding education program reduced CPT unbundling errors. Which metric would be MOST appropriate to measure program impact?
- Pre- and post-training error rates (Correct answer)
- Coder certification levels
- Average claim submission time
- Number of appeals filed
Correct answer: Pre- and post-training error rates
Comparing error rates before and after the intervention directly measures the program's effect on the targeted problem.
Question 4: In evidence-based coding practice, a Level I evidence source would typically be which of the following?
- Expert opinion
- Single case study
- Meta-analysis of randomized trials (Correct answer)
- Cross-sectional survey
Correct answer: Meta-analysis of randomized trials
Meta-analyses of randomized controlled trials represent the highest level (Level I) in evidence hierarchies.
Question 5: A coder finds conflicting guidance between an AHA Coding Clinic and a payer LCD for the same condition. Which source should take precedence for inpatient hospital coding?
- LCD, because payer requirements govern reimbursement
- AHA Coding Clinic, as the official ICD-10-CM guidance (Correct answer)
- CMS transmittals only
- Whichever source was published most recently
Correct answer: AHA Coding Clinic, as the official ICD-10-CM guidance
AHA Coding Clinic is the official guidance resource for ICD-10-CM/PCS and governs correct code assignment regardless of payer policies.
Question 6: When a coding research study reports a p-value of 0.03, what does this indicate about the findings?
- There is a 3% chance the results are clinically significant
- The result is statistically significant at the 0.05 threshold (Correct answer)
- The study has a 3% error rate overall
- The effect size is small
Correct answer: The result is statistically significant at the 0.05 threshold
A p-value of 0.03 is below the conventional 0.05 significance threshold, indicating the result is statistically significant.
Question 7: A coder applies AHRQ quality indicators to identify potential coding errors in DRG assignment. AHRQ stands for which organization?
- American Health Records Quality group
- Agency for Healthcare Research and Quality (Correct answer)
- Association for Hospital Revenue Quality
- American Health Revenue and Quality
Correct answer: Agency for Healthcare Research and Quality
AHRQ (Agency for Healthcare Research and Quality) develops quality indicators used to flag potential problems in administrative data including DRG coding.
Certified Medical Coding Specialist Research & Evidence-Based Practice 2
A medical coder reviews a clinical study comparing ICD-10-CM coding accuracy between two hospital systems.
This type of study is best classified as which research design?