D2160Amalgam - Three Surfaces, Primary or Permanent

What This Code Covers

D2160 covers a three-surface amalgam (silver) filling placed on either a primary (baby) or permanent tooth. The three surfaces are identified using standard tooth surface abbreviations: mesial (M), occlusal (O), distal (D), buccal (B), and lingual (L). A common example is an MOD amalgam filling. This code is for direct placement amalgam restorations only.

Billing Guide

Bill this code when:

• A three-surface amalgam filling is placed on a primary or permanent tooth
• The surfaces are clearly identified and documented (e.g., MOD, MOB, DOL)
• The restoration is a direct-placement amalgam, not an indirect restoration

Do not bill this code when:

• The filling has fewer than three surfaces. Use D2140 (one surface) or D2150 (two surfaces)
• The filling has four or more surfaces. Use D2161
• A composite (tooth-colored) filling is placed instead. Use D2332 or D2335
• The restoration is indirect (inlay/onlay). Use the appropriate D2500-D2600 codes

Insurance and Denial Prevention

Key Payer Rules:

• Most plans cover amalgam restorations at 80% to 100% depending on the plan tier
• Some plans have a waiting period for major restorative services
• If the patient requests composite instead of amalgam, the plan may pay at the amalgam rate and the patient pays the difference
• Frequency limits may apply, typically one restoration per surface per tooth within a set period

Common Denials and How to Respond:

• Frequency limit → Verify when the last restoration was placed on the same tooth and surfaces. If the previous filling failed, submit documentation.
• Downgraded to fewer surfaces → If the payer reduces the surface count, submit a radiograph or narrative supporting the three-surface diagnosis.
• Alternate benefit applied → Some plans pay composite claims at the amalgam rate. This is not a denial but an alternate benefit provision.