CDT CERTIFICATION REVIEW PAPER 2026
QUESTIONS WITH SOLUTIONS GRADED A+
⩥ CDT codes are used to inform insurance companies of services
rendered and to populate _____. Answer: Electronic health records
⩥ What are the three components of a dental procedure code entry?
Answer: Procedure code, nomenclature, and descriptor.
⩥ In the code D0120, what does the 'D' signify? Answer: A specific
dental procedure.
⩥ Category Range: D0100-D0999 Answer: Diagnostic
⩥ Category Range: D1000-D1999 Answer: Preventative
⩥ Category Range: D2000-D2999 Answer: Restorative
⩥ Category Range: D3000-D3999 Answer: Endodontics
⩥ Category Range: D4000-D4999 Answer: Periodontics
, ⩥ Category Range: D5000-D5899 Answer: Prosthodontics - Removable
⩥ Category Range: D6000-D6199 Answer: Implant Services
⩥ Category Range: D7000-D7999 Answer: Oral & Maxillofacial
Surgery
⩥ Category Range: D8000-D8999 Answer: Orthodontics
⩥ Category Range: D9000-D9999 Answer: Adjunctive General Services
⩥ Term: D0120 Answer: Periodic oral evaluation - established patient
⩥ Which diagnostic code is used for an evaluation to determine changes
in health status since the previous comprehensive or periodic evaluation?
Answer: D0120
⩥ According to the ADA, how often is a D0120 evaluation typically
performed? Answer: Every 6 months.
⩥ Term: D0140 Answer: Limited oral evaluation - problem focused
QUESTIONS WITH SOLUTIONS GRADED A+
⩥ CDT codes are used to inform insurance companies of services
rendered and to populate _____. Answer: Electronic health records
⩥ What are the three components of a dental procedure code entry?
Answer: Procedure code, nomenclature, and descriptor.
⩥ In the code D0120, what does the 'D' signify? Answer: A specific
dental procedure.
⩥ Category Range: D0100-D0999 Answer: Diagnostic
⩥ Category Range: D1000-D1999 Answer: Preventative
⩥ Category Range: D2000-D2999 Answer: Restorative
⩥ Category Range: D3000-D3999 Answer: Endodontics
⩥ Category Range: D4000-D4999 Answer: Periodontics
, ⩥ Category Range: D5000-D5899 Answer: Prosthodontics - Removable
⩥ Category Range: D6000-D6199 Answer: Implant Services
⩥ Category Range: D7000-D7999 Answer: Oral & Maxillofacial
Surgery
⩥ Category Range: D8000-D8999 Answer: Orthodontics
⩥ Category Range: D9000-D9999 Answer: Adjunctive General Services
⩥ Term: D0120 Answer: Periodic oral evaluation - established patient
⩥ Which diagnostic code is used for an evaluation to determine changes
in health status since the previous comprehensive or periodic evaluation?
Answer: D0120
⩥ According to the ADA, how often is a D0120 evaluation typically
performed? Answer: Every 6 months.
⩥ Term: D0140 Answer: Limited oral evaluation - problem focused
