ICD-10 Practice Quiz: 20 Free Questions
Test ICD-10-CM diagnosis rules and ICD-10-PCS inpatient procedure conventions. Every answer includes an explanation.
No account required · Untimed · One answer per question · Free explanations
Start with question 1Choose an answer to begin
Choose one answer for immediate feedback. Each correct answer earns one point. Review all 20 explanations and restart when you finish.
How many character positions must a complete ICD-10-PCS code contain?
What does this ICD test cover?
These independent practice questions cover CM code structure, laterality, exclusions, sequencing and documentation, plus PCS inpatient procedure conventions. They are not official AAPC, AHIMA, CDC or CMS exam questions. There is no single universal “ICD-10 certification exam”; coding credentials have their own scope and requirements.
How should you use your score?
A result of 16 out of 20 means you answered 80% of this question set correctly. It is not a passing standard for a professional credential and does not establish readiness to code patient records. Repeated attempts can reflect recall of these questions; try a different scenario before assuming you have mastered a rule.
Missed a code-system question? Read ICD-10-CM versus ICD-10-PCS. Missed a documentation question? Work through five diagnosis-coding examples before retaking the quiz.
Use the official references for your reporting date
Questions and explanations were reviewed September 29, 2026 against the FY 2026 CM guidelines, April update and FY 2026 PCS guidelines. These convention exercises do not replace a current code book, complete documentation or release-specific instructions.
For service or discharge dates beginning October 1, 2026, check the applicable FY 2027 files through CDC and CMS. Use the release appropriate to the setting and date, not simply the newest download.
Explore credential options in the medical-coding guide, or discuss a fictional practice scenario with the SimpuTech medical-coding AI coach. Verify suggested coding decisions against the official references.