CDT Codes in Dental Billing: Meaning, List & Guide

Dental coding plays a vital role in the management of a dental practice. Dental procedure coding systems are based on the CPT or HCPCS coding systems in the same way as the CDT or Current Dental Terminology Codes. Among the various coding systems used in the practice of dentistry, CDT coding systems are the most frequently used in the practice of dentistry by dental professionals and healthcare organizations providing dental care services. This article will enlighten you about CDT coding systems.

What are CDT Codes?

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CDT Codes are a set of alphanumeric procedure codes developed and maintained by an organization referred to as the American Dental Association (ADA), and are utilized in communication and documentation of dental procedures with all stakeholders in the dental care industry, including patients, providers, payers, and regulators. A CDT code is an alphanumeric term consisting of exactly five characters, beginning with "D" and followed by exactly four digits that identify a procedure as belonging to one of the 13 categories of dental procedures. Associated with each procedure code is nomenclature, or a written definition, and a descriptor, or a written description.

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The CDT codes are a HIPAA-defined standard for the reporting of dental services on claims. HIPAA regulations specify that for a dental claim to be electronically submitted to a covered entity, the claim must use CDT codes. This makes the use of CDT codes a federal requirement for dental claims. The ADA updates the CDT code annually by its Code Maintenance Committee, also known as the CMC. This committee updates the codes of the CDT by analyzing the submissions of various dental professionals, insurance companies, manufacturers, and researchers. There are 10 new codes, 8 codes that have been revised, and 2 codes that have been deleted in the new CDT 2025. There are also 4 editorial changes. The new codes of the CDT for the year 2026 are significant, as they have seen the most changes in recent times, with 60 changes in the codes and 31 new codes.

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How are CDT codes structured?

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The ADA groups all of the CDT codes into 13 categories of service, each with a particular range of four-digit numbers after the "D." Familiarity with this format helps those in the process of billing understand the logic of the code set and pinpoint the proper category of service for a particular procedure or avoid range errors that may happen due to a misapplication of a code in a particular category.

Code Range	Category	Description	Example Codes
D0100–D0999	Diagnostic	Codes for evaluations, radiographs, diagnostic imaging, and laboratory tests. These form the foundation of most patient encounters.	D0150 - Comprehensive oral evaluation; D0274 - Bitewing X-rays (4 images)
D1000–D1999	Preventive	Codes for cleanings, fluoride treatments, sealants, and space maintainers. Among the highest-volume procedures in general dentistry.	D1110 - Adult prophylaxis; D1208 - Topical fluoride (excluding varnish)
D2000–D2999	Restorative	Codes for fillings, crowns, inlays, onlays, and interim restorations. These are high-value procedures frequently audited by dental insurers.	D2393 - Resin-based composite (3 surfaces, posterior); D2712 - Crown (¾ resin-based composite)
D3000–D3999	Endodontic	Codes related to root canal therapy, pulpotomy, apicoectomy, and retreatment of root canals.	D3330 - Root canal therapy (molar); D3346 - Retreatment of previous root canal (anterior)
D4000–D4999	Periodontic	Codes for treating gum disease, including scaling and root planing, osseous surgery, and periodontal maintenance.	D4341 - Scaling and root planing (4+ teeth per quadrant); D4910 - Periodontal maintenance
D5000–D5899	Prosthodontics (Removable)	Codes for removable dentures and prosthetic appliances such as complete and partial dentures.	D5110 - Complete denture (maxillary); D5213 - Partial denture (maxillary, resin base)
D5900–D5999	Maxillofacial Prosthetics	Codes for prosthetic reconstruction of facial structures and specialized appliances such as obturators.	D5931 - Surgical obturator prosthesis; D5955 - Palatal augmentation prosthesis
D6000–D6199	Implant Services	Codes for implant placement, implant-supported restorations, and implant maintenance procedures.	D6010 - Surgical placement of implant body; D6081 - Single implant scaling and debridement
D6200–D6999	Prosthodontics (Fixed)	Codes for fixed bridges, crowns on implants, and other fixed restorations supported by teeth or implants.	D6240 - Pontic (porcelain fused to high noble metal); D6750 - Crown (porcelain fused to high noble metal)
D7000–D7999	Oral & Maxillofacial Surgery	Codes for tooth extractions, surgical removal of impacted teeth, fracture treatment, and other oral surgeries.	D7140 - Extraction of erupted tooth; D7240 - Removal of impacted tooth (completely bony)
D8000–D8999	Orthodontic Services	Codes for orthodontic treatment, retainers, appliance adjustments, and newer aligner technologies.	D8080 - Comprehensive orthodontic treatment (adolescent); D8660 - Pre-orthodontic examination
D9000–D9999	Adjunctive General Services	Codes for services that support dental care, including anesthesia, emergency treatment, bleaching, and occlusal guards.	D9110 - Palliative emergency treatment; D9930 - Treatment of post-surgical complications
D9900s	Sleep Apnea Services (2025)	New CDT category covering oral appliances used to treat obstructive sleep apnea and related follow-up care.	Codes for maxillary and mandibular sleep apnea appliance fabrication and adjustments

How to use CDT codes for dental claims?

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Translating a clinical dental encounter into a clean, accurate, payable claim is a multi-step workflow. Each step in the process represents an opportunity to get coding right, or a point of failure that generates denials. The following framework covers the complete CDT claim submission cycle, from code selection to benefit coordination.

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Find the Correct Codes

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Select the Most Precise CDT Code for Each Procedure Performed

Start with the clinical documentation, treatment notes, radiographs, periodontal charts, and lab results, and find all the distinct services provided during the visit.

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Complete the ADA Claim Form with Accurate Information

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The ADA Dental Claim Form (formerly J430) is used for dental claims. It contains sections for patient demographics and insurance information, provider NPI and licensure, tooth numbers or areas treated, surfaces treated, date of service, and a list of CDT codes with fees.

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Include Supporting Documentation

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Include Radiographs, Periodontal Charts, and Clinical Narrative

For a majority of the CDT codes, supporting documentation is necessary. For restorative procedures such as crowns and onlays, a pre-operative radiograph showing clinical need is necessary. For D4341/D4342 – Periodontal scaling of roots of teeth – a periodontal chart showing pocket depths, bleeding on probing, and bone loss is necessary.

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Submit Claims to Insurance Providers

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Submit Electronically Through a HIPAA-Compliant Clearinghouse

The standard and quickest way for dental providers to submit claims to payers is electronically, using a dental clearinghouse.

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Monitor Claim Status

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Track Every Claim You Submit Until Payment or Denial

The moment a claim is submitted, it is considered a claim, but it is not considered a paid claim. Tracking claims is a must. This ensures denials are caught promptly, prior to the end of the appeal window, and underpayments are caught promptly, prior to write-off.

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Stay Updated on Coding Changes

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Update Your CDT Reference and Workflow at the Start of Each Calendar Year. CDT coding updates take effect on January 1 each year. If a dental provider uses a deleted CDT code after January 1, claims are automatically rejected.

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Coordinate Benefits When Necessary

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Use Coordination of Benefits Rules When a Patient Has Multiple Plans. If a patient has two dental plans, for example, a plan from their employer and a plan from their spouse's employer, a coordination of benefits is used.

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How RapidClaims Supports CDT Dental Codes Accuracy

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RapidClaims uses AI-powered intelligence to assist dental coding teams in ensuring the accuracy of the CDT code being sent out with the claim. It helps the billing team pick the most accurate CDT code for the procedure performed. It also helps in identifying outdated and deleted codes before the claim is sent out. It helps in identifying missing documents based on the procedure performed. It helps in identifying denial patterns by code categories. Using the dental billing workflow with the inclusion of the RapidClaims system helps in reducing the first-pass denial rates and increases the speed of the claim-to-payment process. It helps in ensuring that the CDT code being sent out is defensible.

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To summarise, dental medicine is changing faster than ever. With revisions being made in dental billing codes on a regular basis, it is important to educate hospital staff on the guidelines followed for CDT codes in dental procedures. This way, the hospital and individual dental healthcare facilities are able to receive timely payments. If the staff is aware of how to send the CDT codes to insurance companies, they are able to reduce the percentage of dental claim denials. To move with the times, technology must be employed. Using AI technology in the form of coding software like RapidClaims can facilitate the medical billing process.

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FAQs

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1. What does CDT stand for in dentistry?

CDT stands for Current Dental Terminology, a standard dental procedure code system developed by the American Dental Association for billing dental services and filing dental insurance claims.

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2. What are CDT dental codes used for?

CDT dental codes are dental procedure codes that are utilized to document dental procedures such as dental exams, cleanings, fillings, and crowns when filing dental insurance claims.

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3. Where can I find a CDT code list?

The complete CDT codes list is available from the American Dental Association. The CDT dental procedure codes list is updated annually by the American Dental Association and includes dental procedure codes for diagnostic procedures, preventives, restorative procedures, surgical procedures, and orthodontic procedures.

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4. What is the difference between CDT and CPT dental codes?

The difference between CDT and CPT codes is that CDT dental codes are utilized for dental procedures, whereas CPT codes are utilized for medical services; however, dental procedures that are filed under medical insurance use CPT dental codes.

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5. What is the dental code for a sectional bridge?

The dental code for a section bridge is within the CDT D6200-D6999 range, which is utilized for fixed prosthodontic services that include dental bridges and dental crowns.

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About the author

Ayeesha Siddiqua

Lead Coder · RapidClaims

Ayeesha Siddiqua is a highly experienced medical coding professional with 22 years of expertise in E/M Outpatient, Radiology, and Interventional Radiology (IVR), ensuring coding accuracy, regulatory compliance, and optimized reimbursements at RapidClaims.

What Are CDT Codes in Dental Billing and How Do They Work?