D6750Retainer Crown - Porcelain Fused to High Noble Metal

What This Code Covers

D6750 covers a porcelain-fused-to-metal (PFM) crown with a high noble metal substructure used as a retainer (anchor) for a fixed dental bridge. The retainer crown is cemented onto a natural abutment tooth and supports the pontic (false tooth) that replaces the missing tooth. This is different from a single crown (D2750) because it is part of a multi-unit bridge, not a standalone restoration.

Billing Guide

Bill this code when:

• A PFM crown with high noble metal serves as a bridge retainer
• The crown is cemented on a natural tooth that anchors a fixed bridge
• The metal substructure is high noble (over 60% noble metals, at least 40% gold)
• The bridge also includes a pontic code (D6240, D6245, etc.)

Do not bill this code when:

• The crown is a single-tooth restoration (not part of a bridge). Use D2750
• The retainer is all-ceramic. Use D6740
• The retainer metal is noble (not high noble). Use D6752
• The retainer is on an implant. Use abutment-supported or implant-supported crown codes

Insurance and Denial Prevention

Key Payer Rules:

• D6750 is billed per retainer (per abutment tooth)
• A typical three-unit bridge has two retainer codes and one pontic code
• Some payers apply LEAT and pay all retainers at the base metal PFM rate
• Bridge benefits are typically classified as major restorative at 50% coverage
• Frequency limits for crowns (5-10 years per tooth) may apply to retainers

Common Denials and How to Respond:

• Downgraded to base metal rate - The payer is applying LEAT. The patient may owe the difference.
• Frequency limit - If the abutment tooth had a previous crown, verify the plan's replacement frequency and document why a new retainer is needed.
• Should be an implant - Document the clinical rationale for choosing a bridge over an implant for this patient.