- CDT codes (Current Dental Terminology) are the ADA-maintained 'D' procedure codes used in dental billing and insurance reporting.
- CDT 2026 brings 60 total code changes, including 14 revisions and 6 deleted codes, effective January 1, 2026.
- Any deleted CDT code submitted after January 1, 2026 is rejected — and new codes should be used from day one.
- Categories most affected include diagnostic, restorative, periodontal, oral surgery, prosthodontic, and sleep apnea codes.
- Update your fee schedule, train your team, refresh narratives, update scrubbing rules, and partner with a current-code-aware biller.
This guide covers everything you need to know about CDT codes in 2026: what changed, what's new, and how to update your billing process.
What Are CDT Codes?
CDT codes — Current Dental Terminology — are the standardized procedure codes used in dental billing and insurance reporting. Developed in 1969 and maintained by the ADA's Council on Dental Benefit Programs, these codes define every dental service a provider may perform and bill for.
Think of CDT codes as the "dental billing language." Insurance companies use them to determine coverage, calculate reimbursement, and process claims. If your practice isn't using the right codes, the conversation with the insurance company breaks down — and you don't get paid.
CDT codes follow a standard format: the letter "D" followed by four digits (e.g., D1110 for adult prophylaxis, D2750 for crown-porcelain fused to high noble metal).
CDT 2026: Key Changes Overview
CDT 2026 includes 60 total code changes. Here's a breakdown of the categories:
| Change Type | Count |
|---|---|
| New codes | Included in the 60 changes |
| Revised codes | 14 revisions |
| Deleted codes | 6 deleted |
| Editorial changes | Additional minor modifications |
Critical Action: Any deleted CDT code submitted after January 1, 2026 will be rejected immediately. Any newly applicable code that applies to a procedure you're performing should be used from January 1 forward.
Categories Most Affected by CDT 2026 Changes
Diagnostic Codes (D0000–D0999)
The diagnostic category covers examinations, X-rays, and diagnostic procedures. 2026 revisions in this category affect documentation requirements for some imaging codes. Practices should review:
- Bitewing X-ray codes (D0272, D0273, D0274) — frequency and imaging requirements
- Full-mouth series (D0210) — documentation thresholds
- Comprehensive oral evaluation codes — ensure clinical notes support the level billed
Restorative Codes (D2000–D2999)
Crown and filling codes see several revisions in 2026. Key areas:
- Composite resin restoration codes — material specification requirements
- Crown codes — confirm correct use of D2710–D2799 range based on material type
- Indirect restoration removal — billing for removal of existing restorations has specific code requirements
Periodontal Codes (D4000–D4999)
Periodontal coding accuracy is critical because periodontal procedures are among the most frequently denied categories. 2026 changes in this category focus on:
- Scaling and root planing documentation requirements (D4341, D4342)
- Periodontal maintenance (D4910) frequency documentation
- Gingival procedures — ensure clinical justification is documented
Oral and Maxillofacial Surgery Codes (D7000–D7999)
Surgical coding updates for 2026 include changes to extraction and implant-related codes. Watch for:
- Extraction code documentation requirements
- Implant maintenance codes (D6180) — introduced in recent cycles, now with refined documentation requirements
- Implant screw replacement coding
Prosthodontic Codes (D5000–D5899, D6000–D6199)
Fixed and removable prosthodontic codes see revisions in 2026. Key updates involve:
- Overdenture codes (D5863, D5864) — material and retention mechanism documentation
- Implant-supported prosthetics — ensure code selection matches the specific implant system and prosthesis type
Sleep Apnea (D9000–D9999)
The oral appliance category for sleep apnea (D9959 and related codes) continues to evolve. With growing crossover between dental and medical billing for sleep apnea devices, accurate coding is essential to maximize reimbursement from both dental and medical insurance plans.
How to Update Your Practice for CDT 2026
Step 1: Audit Your Fee Schedule
Update your dental practice management software (Dentrix, Eaglesoft, Curve Dental, Open Dental, etc.) with the 2026 CDT code set. Work with your software vendor to ensure all deleted codes are flagged and new codes are added to your fee schedule.
Step 2: Train Your Clinical and Administrative Teams
Everyone who contributes to a claim — from the clinician documenting the procedure to the biller coding it — needs to understand the relevant 2026 updates. Hold a training session in December or January to walk through the changes most relevant to your practice's procedure mix.
Step 3: Update Your Narratives and Documentation Templates
If CDT 2026 changes documentation requirements for procedures you commonly perform, update your clinical note templates accordingly. Pre-written narrative templates for major restorative, periodontal, and surgical procedures should be reviewed and revised.
Step 4: Review Your Billing Software's Code Scrubbing Rules
Practice management software with claim scrubbing features should be updated to flag uses of deleted codes and alert for common coding errors on revised codes. If you use an external claim scrubbing service, confirm it's been updated for 2026.
Step 5: Partner with a Current-Code-Aware Billing Team
The most reliable way to ensure your claims use current CDT codes is to work with a dental billing team that tracks code changes as a core competency. At Verimedix, our billing specialists update their CDT knowledge every year and monitor ADA announcements to ensure every claim we submit reflects current coding standards.
Frequently asked questions
CDT codes (Current Dental Terminology) are the standardized procedure codes used in dental billing and insurance reporting. Maintained by the ADA, they follow a 'D' + four-digit format, such as D1110 for adult prophylaxis.
CDT 2026 includes 60 total code changes, including 14 revisions and 6 deleted codes, effective January 1, 2026. Categories most affected include diagnostic, restorative, periodontal, oral surgery, prosthodontic, and sleep apnea codes.
Any deleted CDT code submitted after January 1, 2026 is rejected immediately. New codes that apply to procedures you perform should be used from January 1 forward to avoid denials.
Audit and update your fee schedule, train clinical and administrative teams, update narrative and documentation templates, review your billing software's code-scrubbing rules, and partner with a current-code-aware billing team.
Periodontal procedures are among the most frequently denied categories. Accurate use of scaling and root planing codes (D4341, D4342) and periodontal maintenance (D4910), with proper documentation, is essential to avoid denials.