D2160 is the CDT code for a three-surface amalgam restoration on a primary or permanent tooth. It covers direct silver amalgam fillings that span exactly three tooth surfaces. The surface count determines this code, not the tooth type or location.
Last updated June 2026 · Reviewed by the PracticeAlpha billing team
Get help with D2160 claims →Use D2160 when placing a direct amalgam restoration that restores exactly three surfaces on a primary or permanent tooth. The surfaces most commonly combined are mesial-occlusal-distal (MOD), or variations involving the buccal or lingual surfaces. The surface count is what determines the code.
Common clinical scenarios: A molar with extensive interproximal and occlusal decay requiring an MOD amalgam. A large recurrent decay situation on a previously restored tooth now involving three surfaces. A pediatric patient with a three-surface carious lesion on a primary molar where amalgam is the selected material.
Do NOT use D2160 for: Two-surface restorations (use D2150). Four or more surface restorations (use D2161). Composite or resin-based restorations (use D2391 or D2392 for posterior composites). Restorations on anterior teeth (anterior amalgams are unusual; verify clinical indication). Temporary or sedative fillings (use D2940).
The most common denial trigger is a discrepancy between the surfaces documented in the chart and the surfaces billed. If the clinical note or charting records two surfaces but the claim shows three, the payer will downgrade or deny. Always confirm the surface count in your documentation matches the code before submitting.
Most plans restrict how soon the same tooth can be restored again. If the patient had a restoration on this tooth within the plan's lookback period, the claim will be denied. Review the patient's history and the plan's frequency rules before starting treatment. Submit a narrative with supporting documentation if clinical necessity overrides the limitation.
A bitewing or periapical x-ray showing the extent of decay is baseline documentation for any restoration. Without it, payers have no way to verify the clinical necessity. Always attach or have on file a radiograph dated within a reasonable period of the treatment date.
Some plans have specific policies around amalgam. A small number of plans no longer cover amalgam at all. Others will pay the amalgam rate even when composite is placed. Know the patient's plan benefits before selecting the restorative material if cost coverage matters to the patient.
Record the specific tooth number and each of the three surfaces restored. Use standard surface abbreviations: M, O, D, B, L. The surfaces in the chart must match the surfaces on the claim.
A bitewing or periapical x-ray documenting the carious lesion or failing existing restoration. The x-ray date should be reasonably close to the treatment date.
Note the diagnosis: primary decay, recurrent decay, or fractured existing restoration. Document why amalgam was selected and that three surfaces were involved clinically.
Note whether the tooth is primary or permanent. This affects how some payers process the claim and is required for pediatric billing accuracy.
Amalgam claims getting downgraded or denied? We review the coding and documentation patterns causing it.
Learn about our billing servicesD2160 is the CDT code for a three-surface amalgam restoration on a primary or permanent tooth. It covers direct silver amalgam fillings spanning exactly three tooth surfaces, such as mesial, occlusal, and distal.
D2150 covers two-surface amalgam restorations and D2161 covers four or more surfaces. D2160 is used when exactly three surfaces are restored. The number of surfaces is the determining factor.
Yes. D2160 applies to both primary and permanent teeth. The CDT description includes both tooth types, so the same code is used regardless of whether the tooth will eventually be shed.
Common reasons include surface count mismatch between charting and the claim, missing radiographic documentation, frequency limitation (too soon since the last restoration on the same tooth), and plans that exclude or downgrade amalgam coverage.
A bitewing or periapical radiograph showing the decay, clinical notes identifying which three surfaces were restored, the tooth number, and whether the tooth is primary or permanent.
Most plans cover amalgam as a basic service, typically at 70 to 80 percent after the deductible. Some plans apply frequency limits per tooth. Check the patient's specific plan for surface and frequency rules before treatment.
Search all 206 CDT codes in our dental coding guide.