CDT Codes 2026.

Code	Procedure	Category	Billing note
D0120	Periodic oral evaluation	Diagnostic	Frequency limits apply — check plan.
D0150	Comprehensive oral evaluation	Diagnostic	Usually once per provider per 3 yrs.
D0210	Intraoral — complete series	Diagnostic	Often 1 per 3–5 yrs; document need.
D1110	Prophylaxis — adult	Preventive	2 per year typical; verify interval.
D2391	Resin-based composite — 1 surface, posterior	Restorative	Watch downgrade to amalgam fee.
D2740	Crown — porcelain/ceramic	Restorative	Often needs narrative + radiograph.
D3330	Endodontic therapy — molar	Endodontics	Pre-op & post-op films usually required.
D4341	Periodontal scaling/root planing — 4+ teeth	Periodontics	Requires perio charting + radiographs.
D6010	Surgical implant placement	Implant	Pre-auth strongly recommended.
D7140	Extraction — erupted tooth	Oral Surgery	Document tooth # and reason.

Sample of 800+ codes in the full reference.

CDT is a code set maintained and copyrighted by the American Dental Association, updated annually. Last updated August 1, 2026.