D2394Resin-Based Composite - Four or More Surfaces, Posterior - Primary

What This Code Covers

D2394 covers a large resin-based composite filling involving four or more surfaces on a primary (baby) posterior tooth. This is used when a baby molar has extensive decay across most of its surfaces. At this level of destruction, the dentist may also consider a stainless steel crown (D2930) or prefabricated crown as an alternative.

Billing Guide

Bill this code when:

• A composite filling involving four or more surfaces is placed on a primary premolar or molar
• All surfaces are clearly identified and documented
• The tooth is a primary tooth, not permanent

Do not bill this code when:

• The tooth is permanent. Use D2393
• A stainless steel crown is placed. Use D2930
• Fewer than four surfaces are involved
• The tooth should be extracted rather than restored

Insurance and Denial Prevention

Key Payer Rules:

• Some payers may recommend a stainless steel crown over a four-surface filling on a primary tooth
• Alternate benefit downgrades to amalgam rates are common for posterior composites
• Medicaid programs may have specific guidelines on composite vs. crown for primary teeth
• Pre-authorization may be recommended for large restorations on primary teeth

Common Denials and How to Respond:

• Crown recommended → Document why a composite was clinically appropriate (remaining structure, patient cooperation, time until exfoliation).
• Downgraded to amalgam → Inform the patient of the alternate benefit. The difference is patient responsibility.
• Tooth should be extracted → Document the tooth's prognosis and the expected time until natural exfoliation.