Question 1

What is a CDT code in dentistry?

Accepted Answer

CDT (Code on Dental Procedures and Nomenclature) codes are standardized numeric codes published by the American Dental Association (ADA) that identify specific dental procedures. Dentists use these codes when submitting claims to insurance companies. Each code begins with 'D' followed by four digits, organized into categories by procedure type.

Question 2

Why do dental insurance companies deny CDT codes?

Accepted Answer

Dental insurers deny CDT codes for several reasons: frequency limitations (e.g., only covering prophylaxis twice per year), lack of documented medical necessity, missing supporting documentation (radiographs, clinical notes), plan benefit exclusions, waiting periods for major services, or downgrades to less expensive procedures.

Question 3

What CDT codes get denied most often?

Accepted Answer

The most commonly denied CDT codes include D2740 (all-ceramic crown), D6010 (implant placement), D4341 (scaling and root planing), D3330 (molar root canal), D0330 (panoramic radiograph), D1206 (fluoride varnish), and D2950 (core buildup). These codes require strong clinical documentation to overturn denials.

Question 4

How do I appeal a dental insurance denial?

Accepted Answer

To appeal a dental insurance denial: (1) Identify the exact denial reason from the EOB, (2) Gather supporting clinical documentation—radiographs, periodontal charts, clinical notes, (3) Write a formal appeal letter citing the CDT code description, ADA clinical guidelines, and patient-specific findings, (4) Submit within the insurer's appeal deadline (typically 30–180 days). DenialRx generates compliant appeal letters in 60 seconds.

CDT Dental Code Reference &
Denial Appeal Guide

Preventive D0100–D0999

Restorative D2000–D2999

Endodontics D3000–D3999

Periodontics D4000–D4999

Prosthodontics D5000–D5899

Oral & Maxillofacial Surgery D7000–D7999

Got a denial for one of these codes?

CDT Dental Code Reference &Denial Appeal Guide