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Medical Coding Practice Questions That Build Competency
Practice makes… certification ready.
But more importantly, job ready.
CodeDrill™ is CCO’s upcoming practice-question platform for students and working coders. Drill exam-style questions, review a rationale that explains why each answer is right or wrong and where the guidance comes from, and master the coding competencies that credential exams and employers expect.
Free list. No subscription. Joining gets you launch news and early-access offers. Pricing and plans will be announced before launch.
Can’t see the form? Open the priority access form in a new tab.
Rationales that teach
Every question explains the correct answer and why each distractor fails, so a missed question becomes a mini-lesson instead of a guess-and-move-on.
Cited, current guidance
Rationales reference AHA Coding Clinic, the ICD-10-CM Official Guidelines, NCCI policy and LCD/NCD guidance where they apply. Questions are current to FY 2026 ICD-10-CM and CY 2026 CPT and refreshed each code-set release.
Real exam formats
Scenario vignettes, operative-report coding and modifier application, not one-line recall trivia.
Specialty depth
Coverage for CRC, HCS-D, BCHH-C, COS-C, CDIP, CCDS and CCDS-O, where most practice apps stop at CPC.
Competency you can see
Track your competency by topic and credential. Weak Spot Repair and readiness scoring use your actual performance, so you know exactly what to drill next.
Written by CCO instructors
Built by the credentialed CCO educators who have trained coders for their exams since 1999. Missed something? Your related CCO course chapter or video is one click away.
CodeDrill questions
When will CodeDrill launch?
A launch date hasn’t been announced. Join the priority access list and we’ll email you when CodeDrill opens, along with launch updates and early-access offers.
Does joining the list cost anything or start a subscription?
No. The priority access list is free and doesn’t purchase a subscription. Pricing and plan details will be announced before launch.
Which credentials will CodeDrill cover?
CodeDrill is being built for credentialed and credential-seeking coders preparing for CPC, CRC, CCS, HCS-D, BCHH-C, COS-C, CDIP, CCDS and more. Tell us which credentials you’re studying for on the form so we know what matters most to you.
How is CodeDrill different from other practice apps?
Every question is written by credentialed CCO instructors and comes with a full rationale that explains the correct answer and why each wrong answer fails, with references to official coding guidance. Coverage goes beyond CPC into specialty credentials many apps skip.
Will it work on my phone?
Yes. CodeDrill is being built for web and mobile, so you can practice at your desk or on the go.