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Restorative
D2000-D2999

D2330Resin-Based Composite, One Surface, Anterior

2026 Billing Guide · Last reviewed

A single-surface tooth-colored composite filling on an anterior (front) tooth, used to restore decay or minor damage on incisors and canines.

What This Code Covers

D2330 covers the placement of a single-surface resin-based composite (tooth-colored) filling on an anterior tooth. Anterior teeth include the central incisors, lateral incisors, and canines (teeth numbers 6-11 and 22-27 in permanent dentition). The procedure includes etching, bonding, placement and light-curing of the composite material, and finishing and polishing the restoration to match the natural tooth.

Billing Guide

Bill this code when:

  • Decay or damage affects one surface of an anterior tooth and composite resin is placed
  • The tooth being restored is an incisor or canine (primary or permanent)
  • The restoration is a direct placement, not an indirect lab-fabricated restoration
  • The composite is used for a functional restoration, not purely cosmetic bonding

Do not bill this code when:

  • The restoration involves two or more surfaces. Use D2331 for two surfaces or D2332 for three surfaces on an anterior tooth
  • The tooth is a premolar or molar. Use D2391 for a single-surface posterior composite
  • The procedure is cosmetic bonding for shape correction without decay. Consider D2999 (unspecified restorative) with a narrative, as this may not be covered
  • A veneer is placed instead of a direct filling. Use D2961 for a direct veneer or D2962 for an indirect veneer

Insurance and Denial Prevention

Key Payer Rules:

  • Anterior composites are classified as basic restorative and typically covered at 70-80%
  • Unlike posterior composites, anterior composites are not subject to alternative benefit downgrades since amalgam is not a standard option for front teeth
  • Most plans do not require pre-authorization for basic anterior fillings
  • Some plans limit the number of restorations per tooth within a rolling time period (often 24 months)

Common Denials and How to Respond:

  • Denied as cosmetic -> Appeal with radiographs and clinical notes clearly documenting caries, fracture, or a failed prior restoration. Emphasize the functional need, not the aesthetic outcome
  • Tooth number not recognized as anterior -> Verify correct tooth numbering. If the plan system flags canines as posterior, submit a narrative clarifying tooth position and standard ADA classification
  • Duplicate claim for same tooth -> Provide updated radiographs showing new pathology or documentation of restoration failure since the last procedure
  • Missing documentation -> Resubmit with the full set of radiographs, clinical notes, and correct surface designation

Claim Submission Checklist

0/5 complete
Tooth number and single surface treated are documented
Pre-operative radiograph or clinical photograph showing the area of decay or damage
Clinical notes describing the diagnosis (caries, fracture, or defective restoration)
Composite material type noted in the procedure record
Shade selection documented if relevant to the clinical record

Frequently Asked Questions

Yes, in many cases. Anterior composites are generally covered at the same rate as any basic filling because composite is the standard material for front teeth. Posterior composites, on the other hand, are often subject to alternative benefit clauses where the payer covers only the amalgam equivalent fee. This distinction means anterior composites typically have fewer coverage issues.

It depends on the reason for the chip. If the chip resulted from trauma or structural failure and the restoration is functionally necessary, D2330 may be appropriate. Document the cause and functional need clearly. If the repair is purely cosmetic with no functional deficit, many plans will deny the claim.

The difference is tooth location. D2330 is for anterior teeth (incisors and canines), while D2391 is for posterior teeth (premolars and molars). Both cover single-surface composite fillings, but they are coded separately because payer rules and reimbursement often differ by tooth position.

Keep This Handy

Save this D2330 reference for quick access during billing.

Explore Related Codes

Codes commonly billed alongside or often confused with this procedure.

D2331

Resin-Based Composite, Two Surfaces, Anterior

A two-surface tooth-colored composite filling on an anterior (front) tooth, used when decay or damage involves two surfaces of an incisor or canine.

D2391

Resin-Based Composite, One Surface, Posterior

A single-surface tooth-colored composite filling on a posterior (back) tooth. Many payers downgrade posterior composites to amalgam pricing under alternative benefit clauses.

D2140

Amalgam, One Surface, Primary or Permanent

A single-surface amalgam (silver) filling placed on any primary or permanent tooth to restore decay affecting one surface.

D2150

Amalgam, Two Surfaces, Primary or Permanent

A two-surface amalgam (silver) filling on a primary or permanent tooth, used when decay or damage spans two surfaces such as mesial-occlusal.

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