D4261Osseous Surgery (Including Elevation of a Full Thickness Flap and Closure) - One to Three Contiguous Teeth or Tooth Bounded Spaces Per Quadrant

What This Code Covers

D4261 covers periodontal osseous surgery involving one to three contiguous teeth or tooth-bounded spaces in a single quadrant. Like D4260, the procedure includes a full-thickness flap, bone recontouring, and suture closure, but it is limited to a smaller area. This is used for localized advanced periodontal disease where bone loss and deep pockets are confined to a few teeth in the quadrant.

Billing Guide

Bill this code when:

• Osseous surgery is performed on one to three contiguous teeth in one quadrant
• A full-thickness flap is raised, bone is recontoured, and the flap is sutured
• The patient has localized advanced periodontal disease with bone loss
• Non-surgical treatment was completed and re-evaluated before surgery

Do not bill this code when:

• Four or more contiguous teeth are treated in the quadrant. Use D4260
• No bone recontouring is performed. Use D4241 for a flap procedure without osseous surgery
• The procedure is for restorative crown lengthening. Use D4249
• Only soft tissue is removed (no flap, no bone). Use D4211

Insurance and Denial Prevention

Key Payer Rules:

• D4261 is classified as a major periodontal benefit
• The same pre-requisites as D4260 apply (prior scaling and root planing, re-evaluation)
• The fee is typically lower than D4260 due to fewer teeth involved
• Some payers require explanation of why only a few teeth needed surgery while others in the quadrant did not

Common Denials and How to Respond:

• Should be D4260 - Verify the tooth count. D4261 is correct for one to three contiguous teeth. Provide the specific tooth numbers treated.
• No prior non-surgical treatment - Submit records of D4341/D4342 and the re-evaluation showing persistent localized disease.
• Not medically necessary - Submit charting showing persistent deep pockets (5mm+) and bone loss at the specific teeth treated, despite non-surgical therapy.