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

What is D4323?

A billing guide to D4323 for extra-coronal stabilization of natural teeth or prosthetic crowns, including tooth-level documentation.

When to use D4323

Use D4323 when teeth or prosthetic crowns are stabilized with a splint placed on the external surface. Identify every involved tooth and document mobility, diagnosis, materials, and planned duration.

Billing and documentation for D4323

Distinguish the service from trauma-related stabilization and intra-coronal splinting. Payers may request radiographs, periodontal findings, and a narrative supporting the separate clinical need.

Frequently asked questions about D4323

What makes D4323 extra-coronal?

The stabilizing material is placed on the outside surface of the teeth or prosthetic crowns.

Which teeth should be documented?

List every tooth or crown included in the splint and record mobility and supporting findings.

Can D4323 be denied as inclusive?

Yes. Some plans bundle splinting with other treatment, so document the distinct clinical need.