CDC Study Guide 2026
Everything you need to pass the CDC exam in one place: the exam format, every topic to study, real practice questions with explanations, flashcards, and full-length practice tests. Free, no sign-up needed.
📋 CDC Exam Format at a Glance
📚 CDC Topics to Study (21)
✍️ Sample CDC Questions & Answers
1. Which CDT code is used for cone beam CT of one jaw?
D0364 represents cone beam CT image — craniofacial data capture, one jaw, in the CDT code set.
2. When a dental coder must report a procedure not adequately described by any existing CDT code for a periodontal service, which code is used?
D4999 is the unspecified periodontal procedure code used when no existing CDT code accurately describes the service rendered, and it typically requires a written narrative.
3. The removal of a soft tissue-impacted tooth is reported with which CDT code?
D7220 is the CDT code for removal of an impacted tooth with soft tissue impaction only.
4. What is a needs assessment in CDC Infection Control & Prevention practice?
A needs assessment identifies gaps between current performance and desired outcomes to justify improvements.
5. What CDT code describes the localized delivery of antimicrobial agents into periodontal pockets as an adjunct to scaling and root planing?
D4381 is the code for localized delivery of antimicrobial agents (such as chlorhexidine chip or doxycycline gel) into periodontal pockets as an adjunct to SRP.
6. Why is regular review important in CDC risk management?
Regular reviews ensure assessments remain current as conditions change and lessons from incidents are incorporated.