D5937Trismus Appliance (Not for TDM Treatment)

What This Code Covers

D5937 covers trismus appliance (not for tdm treatment). This appliance is used to gradually increase mouth opening in patients with limited jaw movement. It is not used for TMD treatment.

Billing Guide

Bill this code when:

• The procedure described by D5937 is performed and documented
• The clinical indication supports the procedure
• Documentation meets the payer's requirements for the service

Do not bill this code when:

• A different procedure was actually performed
• The procedure is included in another code being billed at the same visit
• Documentation does not support the medical necessity of the procedure
• The procedure is better described by D5919 (Facial prosthesis)

Insurance and Denial Prevention

Key Payer Rules:

• Most plans have frequency limits for denture replacement (typically once every 5-10 years)
• Relines, rebases, and repairs have separate frequency limits
• Prior authorization is commonly required for new complete and partial dentures
• Maxillofacial prosthetic codes may not be covered under standard dental plans

Common Denials and How to Respond:

• Frequency limit for replacement - Document why the current prosthesis cannot be repaired or relined and must be replaced.
• Prior authorization not obtained - Submit post-service with full documentation if prior auth was not obtained before delivery.
• Not a covered benefit - For maxillofacial prosthetics, check if coverage exists under the patient's medical plan rather than dental.