By Qamar S, 15 years in US medical billing · Last reviewed October 18, 2026
Week 2 of the free CPC exam prep pathway. Ten questions on ICD-10-CM conventions and the official guidelines: uncertain diagnoses, 7th characters, excludes notes, Z codes and presumed links. Keep your ICD-10-CM book open, just like on exam day.
What to study next
Review Section I of the ICD-10-CM Official Guidelines (conventions and chapter-specific rules) and Section IV (outpatient). Next up: the modifiers, HCPCS and compliance quiz.
Independent study material. MedBillGuide is not affiliated with or endorsed by AAPC, AHIMA or NHA. CPC® is a registered trademark of AAPC. Practice questions are original and are not taken from any certification exam. Always study with current official code books. See our Disclaimer.