Reviewed by Dr. Morgan Heminger · Updated September 16, 2026

What is D2991?

A billing guide to D2991 for topical hydroxyapatite enamel-regeneration treatment on an individual tooth, including documentation and payer checks.

When to use D2991

Use D2991 when a topical hydroxyapatite scaffold or medicament is applied to support enamel regeneration on a specific tooth. Record the treated tooth, diagnosis, product used, and clinical rationale.

Billing and documentation for D2991

Report the service per treated tooth and verify whether the patient’s plan recognizes the procedure. Coverage varies, so document medical necessity and confirm benefits before treatment.

Frequently asked questions about D2991

Is D2991 reported per tooth?

Yes. Document and report each treated tooth according to the payer’s current rules.

What documentation supports D2991?

Chart the treated tooth, diagnosis, material used, application details, and reason the procedure was selected.

Is D2991 always covered?

No. Coverage and authorization rules vary by payer, so verify benefits before treatment.