D4263 Dental Code: Bone Replacement Graft Billing Guide

What D4263 covers

D4263 reports a bone replacement graft that regenerates periodontal bone around a tooth staying in the mouth, billed for the first grafted site in a quadrant. Periodontal disease has carved a defect into the bone supporting the root. The surgeon opens and cleans the site, then packs graft material into the defect so bone can rebuild against the root.

Two conditions decide whether the code is correct:

• A natural tooth has to remain at the site. The descriptor rules out an edentulous space or an extraction site. Carriers police this hardest, because their systems already know which teeth are on file as missing.
• The graft has to treat a periodontal defect. UnitedHealthcare’s bone replacement graft policy, effective May 2026, lists infrabony and intrabony vertical defects and Class II furcation involvements as the indications. It excludes non-vertical defects, teeth with a hopeless prognosis, and grafts done with periradicular surgery.

The graft fee does not include flap entry and closure, wound debridement, osseous contouring, the barrier membrane, or biologic materials. Each is a separate procedure on a separate line.

Which graft code: what happened to the tooth

Every code below places bone in the jaw. They are separated by the state of the tooth and the surgery the graft belongs to, not by the graft material or volume.

• D4263 is a periodontal graft around a retained natural tooth, placed during periodontal surgery.
• D7953 is a graft into an extraction or implant-removal socket to preserve the ridge, placed when the tooth or implant comes out.
• D6104 is a graft placed at the same visit as an implant.
• D6103 is a graft repairing a bony defect around an implant already in place.
• D7950 is a staged augmentation of an edentulous ridge, with no extraction and no same-day implant.
• D3428 is a graft placed with periradicular surgery such as an apicoectomy, with D3429 for each additional contiguous tooth in the same surgical site.

The sorting question: is the tooth staying, and is this periodontal surgery? If yes, D4263. If the tooth just came out, D7953. If an implant goes in the same day, D6104. If the surgery is apical, D3428. The same question applied to every graft code, sockets and sinus lifts included, is in the bone graft dental codes guide.

Counting sites in a quadrant

D4263 is the first site in a quadrant and D4264 is each additional site in that quadrant. The count restarts at the quadrant boundary.

A site is a defect, not a tooth. The American Academy of Periodontology’s coding guidance splits it this way:

1. Two contiguous teeth, two separate osseous defects. Two sites: D4263, then D4264.
2. Two contiguous teeth, one defect that communicates across the interproximal bone. One site: D4263 alone, even though two teeth are involved.
3. Three defects around three teeth in one quadrant. D4263 once, D4264 twice.
4. The same three defects split across two quadrants. D4263 in each quadrant, with D4264 for the remainder in each.

Nothing on the claim form tells the carrier which of these happened; the operative note does. A narrative describing a three-wall vertical defect on the mesial of #3 and a separate two-wall defect on the distal of #5 supports two lines. A narrative saying the upper right quadrant was grafted supports one.

What bills alongside D4263

The graft descriptor excludes the work around it, so a regenerative case is rarely a single code.

• The surgical access. Osseous surgery, D4260 for four or more teeth per quadrant or D4261 for one to three, or a gingival flap procedure with root planing, D4240 or D4241. Some plans make this an explicit condition. Hawaii Dental Service’s periodontics guidelines require the graft to be submitted with a D4240 or D4241 flap entry or a D4260 or D4261 osseous surgery, and Cigna ties the benefit to flap access and osseous reshaping on the same day as the graft. Elsewhere it is a soft signal, but a graft line with no surgical line reads as an incomplete case either way.
• The barrier membrane. D4266 for a resorbable barrier or D4267 for a non-resorbable barrier, reported per site on natural teeth.
• Biologic materials. D4265 when growth factors or similar materials are placed to aid regeneration.

Keep D4266, D4267, and D4265 next to the graft code in the PMS pick list, or they get skipped and the surgery is underbilled. Plans commonly allow one regenerative procedure per site per date of service, so a graft and membrane at the same defect may adjudicate as one benefit. Bill them on separate lines anyway. A bundled line understates the surgery and leaves nothing to appeal.

Coverage and how carriers treat it

Most plans that cover periodontal surgery cover D4263. Review usually focuses on clinical necessity, not the code.

The defect has to be vertical. This is the recurring standard across published policies. Cigna’s 2026 periodontal coverage guidelines make the benefit available where pockets measure 5 mm or deeper with bone loss showing as a vertical bony defect beside the natural tooth. UnitedHealthcare’s policy names infrabony and intrabony vertical defects and Class II furcations. Horizontal bone loss, the more common radiographic pattern, generally fails both standards. Frequency limits, waiting periods, and the exact pocket threshold are plan-dependent; verify them before the surgical date.

Periodontal grafts are usually a benefit where other grafts are not. Hawaii Dental Service lists the periodontal bone graft codes as benefits but treats the implant, ridge augmentation, sinus, and periradicular graft codes as non-benefits, with ridge preservation left to the group contract. Other plans follow the same pattern, which is why a miscoded socket graft costs twice. The correct code might not have paid either, but it would have been denied plainly as uncovered ridge preservation. The wrong code is denied as an invalid site and becomes a difficult call with a patient who was told the graft was covered.

Prior therapy and hygiene get read. The UnitedHealthcare policy excludes patients who were non-compliant with previous periodontal therapy or who present with poor oral hygiene. A chart showing scaling and root planing, then a re-evaluation documenting the residual defect, reviews cleanly. If the graft is the first periodontal treatment on file, expect questions.

Documentation that supports the claim

• Periodontal charting, usually within six months, showing the pocket depths at the grafted teeth.
• Radiographs showing the vertical defect. The bitewing or periapical that shows the intrabony component is the most useful attachment, because it answers the vertical-versus-horizontal question directly.
• A narrative naming each defect by tooth and surface, with the wall count and whether the defects communicate. That one extra sentence supports the site count on any D4264 lines and is the difference between a paid D4264 and a records request.
• The graft material used, and the membrane or biologic if either was placed.
• Evidence of prior nonsurgical therapy and the re-evaluation that found the defect still present.

What to get right in your PMS

1. Label D4263 and D7953 by what happened to the tooth, not by the word graft. If both read as “bone graft” in a pick list, a socket graft will eventually go out on the periodontal code.
2. Enter D4263 once per quadrant and D4264 for the rest, with the quadrant on every line. Templates that default to per-tooth entry on periodontal surgery will post four D4263 lines in one quadrant.
3. Check the tooth’s status before the claim goes out. If the system shows the tooth was extracted at that visit, move the graft to D7953 before the carrier catches it.

For how tooth numbers, quadrants, and the remarks field are filled in on the claim, see the ADA dental claim form guide.