D4260 Dental Code: Osseous Surgery (4+ Teeth) Billing Guide

What D4260 covers

D4260 reports osseous surgery on four or more contiguous teeth or tooth-bounded spaces within a single quadrant. Osseous surgery treats the bone around teeth damaged by periodontal disease. The surgeon raises a full-thickness flap to reach the bone, reshapes or removes the diseased and irregular bone to give the tissue a form it can heal against, then closes the flap. The fee includes both the flap entry and the closure, so those are not billed separately.

The extent is the four-or-more part. Count the contiguous teeth or tooth-bounded spaces treated in the quadrant. Four or more is D4260. One to three is D4261.

D4260 does not cover:

• The same surgery on one to three teeth in a quadrant. That is D4261.
• A flap raised for access and root cleaning without recontouring bone. That is the gingival flap procedure, D4240 (four or more teeth) or D4241 (one to three teeth).
• Nonsurgical scaling and root planing. That is D4341 (four or more teeth) or D4342 (one to three teeth).
• A gingivectomy or gingivoplasty, which removes soft tissue rather than reshaping bone.

When to bill D4260

Bill D4260 when:

• Osseous surgery is performed on four or more contiguous teeth or tooth-bounded spaces in one quadrant.
• Bone is reshaped or removed as part of the procedure, not just accessed.
• The periodontal charting and diagnosis support surgical treatment.

Do not bill D4260 for:

• One to three teeth in the quadrant. Use D4261.
• A flap procedure that does not recontour bone. Use D4240 or D4241.
• Scaling and root planing with no surgery. Use D4341 or D4342.
• Counting teeth across quadrants to reach four. The count is per quadrant.

The extent-per-quadrant rule

D4260 and D4261 describe the identical procedure. The only thing that separates them is how many teeth or tooth-bounded spaces are treated in the quadrant:

• D4260 is four or more contiguous teeth or tooth-bounded spaces per quadrant.
• D4261 is one to three contiguous teeth or tooth-bounded spaces per quadrant.

A tooth-bounded space is an edentulous gap with teeth on each side; it counts in the tally because the surgery still addresses the bone in that span. Count per quadrant, not per arch and not across the mouth. Three teeth in one quadrant and three in the next are two separate D4261 claims, not one D4260. Getting the count wrong is the most common coding error on these two codes.

Osseous surgery versus gingival flap versus root planing

Three periodontal procedures sit near each other in the workflow, and the line between them is what the surgery actually does to the bone:

• Scaling and root planing (D4341, D4342) is nonsurgical. No flap. The hygienist or dentist cleans the root surfaces below the gumline to treat active disease. This is usually the first line of treatment.
• Gingival flap with root planing (D4240, D4241) raises a flap to access the roots for cleaning under direct vision, then closes. It does not reshape bone.
• Osseous surgery (D4260, D4261) raises a flap and reshapes or removes bone to correct the defects periodontal disease left behind, then closes.

The distinguishing line between the flap code and the osseous code is bone recontouring. Same flap entry, same closure; osseous surgery adds the bone work. If the operative note describes osteoplasty or ostectomy, it is osseous surgery. If it stops at flap access and root debridement, it is the gingival flap code. Carriers read the operative note to confirm the code matches what was done.

Documentation that supports the claim

The claim needs:

• Recent periodontal charting, usually dated within six months, showing pocket depths that justify surgery. Many carriers look for 5 mm or greater.
• A diagnosis of periodontitis.
• The teeth treated and the quadrant identified.
• Radiographs showing the bone loss.
• Evidence that nonsurgical therapy, typically scaling and root planing, was done and re-evaluated, and that it did not resolve the disease.

For the operative record, document the flap, the bone recontouring specifically, and the closure. The bone work is what separates D4260 from the gingival flap codes, so the note has to show it.

Plan-dependent coverage

Surgical periodontal benefits come with conditions that vary by plan. Common ones:

• A requirement that scaling and root planing was completed first, often with a waiting period before surgery is eligible.
• Frequency limits on how often osseous surgery is covered per quadrant or per site.
• Minimum pocket-depth thresholds in the charting before the carrier will consider the claim.
• Limits on how many surgical quadrants will be paid in a single visit.

Verify the periodontal benefit before scheduling: the prerequisite therapy, the waiting period, the charting requirements, and any frequency cap. Surgery scheduled before the plan’s prerequisites are met is a predictable denial, and the patient ends up owing for it.

What to get right in your PMS

1. Count teeth and tooth-bounded spaces per quadrant. Four or more is D4260; one to three is D4261. Never tally across quadrants.
2. Make the operative note show the bone work. Bone recontouring is what separates osseous surgery from a gingival flap procedure.
3. Attach recent perio charting. Most carriers want charting within six months with pocket depths that justify surgery.
4. Confirm nonsurgical therapy was done and re-evaluated first. Many plans require it and a waiting period before osseous surgery is eligible.
5. Identify the quadrant on every surgical line. These codes are per quadrant, and multi-quadrant coverage in one visit is plan-specific.