D6040Eposteal Implant

What This Code Covers

D6040 covers an eposteal (subperiosteal) implant, which is a custom-fabricated metal framework placed on top of the jawbone beneath the periosteum (the membrane covering the bone). Posts extend through the gum tissue to support a prosthesis. This type of implant is used in cases where the jawbone is too thin or atrophied for conventional endosteal (in-bone) implants and bone grafting is not an option. Eposteal implants are rarely placed in modern practice but remain in the CDT code set.

Billing Guide

Bill this code when:

• An eposteal (subperiosteal) implant framework is surgically placed on the jawbone
• The patient does not have sufficient bone height or width for endosteal implants
• A custom metal framework is fabricated and placed under the periosteum
• The implant is designed to support a complete or partial prosthesis

Do not bill this code when:

• An endosteal (root-form) implant is placed into the bone. Use D6010
• A mini implant is placed. Use D6013
• An implant abutment is placed. Use D6056 or D6057
• Bone grafting is performed to enable an endosteal implant. Use D7953

Insurance and Denial Prevention

Key Payer Rules:

• D6040 is rarely billed and may not be in some payers' fee schedules
• Many plans exclude implant procedures entirely
• If covered, the payer may require documentation showing why conventional implants are not possible
• Pre-authorization is strongly recommended due to the unusual nature of the procedure

Common Denials and How to Respond:

• Not a covered benefit - Many plans exclude implants. Verify benefits before treatment.
• Alternative treatment available - Document why bone grafting with endosteal implants or a conventional denture is not appropriate for this patient.
• No fee schedule listing - If the payer does not have D6040 in their system, submit with detailed documentation and request manual review.