D2392 is for a resin-based composite filling on two surfaces of a posterior tooth. Two surfaces means the restoration involves two distinct tooth surfaces (e.g., mesio-occlusal, disto-occlusal, mesio-lingual). This code is used frequently in general dentistry when decay or a defective restoration spans two surfaces of a premolar or molar.
D2392 is for a resin-based composite filling on two surfaces of a posterior tooth. Two surfaces means the restoration involves two distinct tooth surfaces (e.g., mesio-occlusal, disto-occlusal, mesio-lingual). This code is used frequently in general dentistry when decay or a defective restoration spans two surfaces of a premolar or molar.
Do NOT use D2392 for: One-surface posterior composites (use D2391). Three-surface composites (use D2393). Four or more surfaces (use D2394). Anterior composites (use D2331 for two surfaces). Amalgam fillings (use D2150 for two-surface amalgam).
Click any code to see the difference.
Two distinct surfaces involved in the restoration. Higher fee, more material, more time.
One surface involved. The restoration doesn't extend into a second surface.
Same as D2391: many PPO plans pay two-surface posterior composites at the two-surface amalgam rate (D2150). The difference per filling adds up across a full day of restorative work. Inform patients in advance.
Billing D2392 when only one surface was restored is upcoding. The preparation must clearly extend into two distinct surfaces. If the decay is only on the occlusal surface, it's D2391 regardless of how large the restoration is within that one surface.
The surfaces listed on the claim must match the clinical notes. If you bill MO but the note says "occlusal composite placed," the payer may deny or audit. Be precise in both places.
If the patient had a filling on the same tooth within the last 6-24 months, the replacement may be denied. Payers set frequency limitations on restorations. If the previous filling was placed recently, you need documentation showing why replacement is clinically necessary: recurrent decay, fracture of the existing restoration, or material failure. Without a narrative explaining clinical necessity, the claim gets denied as a duplicate service.
For two-surface composites involving a proximal surface, payers expect a bitewing showing interproximal decay. If the x-ray doesn't show the caries clearly, or if no x-ray is on file, the claim is vulnerable to a records request or downgrade. The bitewing is your primary justification for the proximal surface involvement. Take it before you prep.
The difference between composite and amalgam reimbursement on a two-surface filling can be $50-100+ per tooth. Across a full day of restorative work, that adds up to hundreds in write-offs or patient balance. The claim doesn't get denied. It gets paid at the amalgam rate. The patient owes the difference. If you don't explain this before treatment, patients get surprised by a balance they didn't expect. Present the downgrade policy during treatment planning so the patient can make an informed decision about material choice.
Document both surfaces clearly: MO, DO, ML, DL, etc. Must match the claim submission.
Caries, fracture, or defective existing restoration documented as the reason for treatment.
Bitewing showing interproximal decay if the restoration involves a proximal surface.
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Learn about our billing servicesD2392 is the CDT code for a two-surface resin composite filling on a posterior tooth.
Many PPO plans reimburse at the two-surface amalgam rate (D2150). Patients pay the difference.
D2392 is two surfaces. D2393 is three surfaces. The number of tooth surfaces involved determines the code.
Search all 206 CDT codes in our dental coding guide.