D2330 is the CDT code for a one-surface resin-based composite (tooth-colored) filling on an anterior (front) tooth — a single-surface restoration on an incisor or canine using tooth-colored material. It is reported per restoration, chosen by surface count and tooth location.
Informational only — confirm the official CDT descriptor and your payers' rules independently. This is general guidance, not billing, coding, or clinical advice.
When to Use the D2330 Code
Report D2330 when a front tooth (incisor or canine) is restored with resin-based composite material on a single surface — for example, a small lesion or chip on a visible tooth. Anterior composite codes run by surface count: D2330 is one surface, D2331 is two, D2332 is three, and D2335 is four or more or involving the incisal angle.
Don't confuse anterior composite codes with the posterior composite series (e.g., D2391 for a one-surface posterior composite) — location matters. And don't mix them up with amalgam fillings (D2140 and up), which use silver material and their own codes. Code by both the material and the tooth's position in the arch.
Documentation & Clinical Scenarios
A front-tooth filling is often cosmetically sensitive, so the record should show what was treated and why:
- Tooth number confirming it's an anterior tooth, and the specific surface restored.
- The diagnosis — caries, fracture, chip, or a failing prior restoration — justifying the filling.
- The material (resin-based composite) and that one surface was involved.
- Supporting evidence such as a photo or radiograph when the defect isn't obvious on the claim.
Anterior surface coding follows the tooth's surfaces rather than a "MOD" shorthand; counting the incisal angle correctly matters because it can push the restoration into the D2335 category. Report the single surface code that matches the actual restoration.
Insurance & Billing Tips
- Verify the restorative benefit. Most plans cover anterior composites as a basic service at a coinsurance level after any deductible.
- Anterior composites are usually paid as placed. Unlike posterior composites, front-tooth composites are typically not down-coded to amalgam, since amalgam isn't used on visible teeth — but confirm the plan's rule.
- Surface count drives the fee. One surface reimburses differently than two or three, so report exactly what was done.
- Check replacement frequency. Plans commonly limit re-restoration of the same tooth/surface (e.g., once every 24 months).
- Document the surface clearly so the one-surface anterior restoration adjudicates correctly.
Example Case
A patient notices a small spot near the edge of an upper front tooth and the dentist confirms decay on one surface. The dentist places a one-surface tooth-colored composite to match the natural shade. The visit is coded D2330 for the anterior tooth, single surface, with a photo on file. Because benefits were verified and the surface reported accurately, the claim is paid at the expected coinsurance with no surprise to the patient.
Patients call about "a white filling on my front tooth" — not D2330. DentalReception AI answers and books those calls 24/7, captures insurance details for clean intake, and routes clinical and cosmetic questions to your team. See how it handles filling calls, or book a demo.
Frequently Asked Questions
What's the difference between D2330 and D2331?
Surface count. D2330 is a one-surface anterior composite, while D2331 is a two-surface anterior composite on the same kind of front tooth. The material and tooth location are the same — only the number of surfaces restored changes the code. Report the single code matching the actual restoration rather than two one-surface lines.
What's the difference between D2330 and D2391?
Tooth location. D2330 is a composite on an anterior (front) tooth; D2391 is a one-surface composite on a posterior (back) tooth. Both are tooth-colored, but front and back composites are coded separately and may be reimbursed differently, so code by the tooth's position in the arch.
Will insurance cover a tooth-colored filling on a front tooth?
Usually yes, as a basic restorative service. Because amalgam isn't used on visible front teeth, anterior composites are generally paid as placed rather than down-coded to a silver rate — though deductibles, frequency limits, and annual maximums still apply. Verifying benefits before treatment lets you give the patient an accurate estimate.
Do I need a pre-authorization for a D2330 filling?
Routine single-surface anterior fillings usually don't require pre-authorization, but verifying the benefit and any deductible beforehand lets you quote an accurate out-of-pocket amount. Keep the tooth number, surface, and a photo or radiograph documented in case of a post-payment review.
Confirm the current CDT descriptor and your specific payer policies before billing — browse the full dental code library or see our insurance verification feature.