D7320 Dental Code: Alveoloplasty Without Extractions

What D7320 covers

D7320 reports alveoloplasty, the surgical recontouring of the alveolar bone, in a quadrant where no teeth are being extracted, when four or more teeth or tooth spaces are involved.

The typical case is a ridge that healed badly. Teeth came out months or years ago, the bone remodeled into sharp crests, knife edges, or an undercut, and the ridge will not accept a denture or partial without being reshaped first. Nothing is being extracted. The surgeon reflects a flap, reduces and smooths the bone, and closes.

Two conditions have to hold before D7320 is the right code:

• No extractions in that quadrant. This is the axis the code is built on. If teeth are coming out of the quadrant you are reshaping, the code is D7310 or D7311 instead.
• Four or more teeth or tooth spaces in the quadrant. The count is per quadrant, and it counts spaces, not just teeth still present. One to three spaces is D7321.

UnitedHealthcare’s alveoloplasty policy lists standalone bone recontouring ahead of fixed or removable prosthetic construction as an indication, alongside recontouring done as part of an extraction, providing stability for implant placement, and debulking bone for a pathologic condition. That first line is the D7320 case, and it is the one to describe in the narrative.

What “not in conjunction with extractions” actually means

The descriptor draws the line at the quadrant. Read literally, a quadrant with no extractions that day qualifies as D7320 even if teeth were removed somewhere else in the mouth on the same date.

Carriers read it more tightly than that, and this is where the denials come from.

• Same quadrant, same date. Not payable as D7320 on any plan worth checking. The alveoloplasty gets folded into the extraction, because current extraction codes already include the minor smoothing of facial and septal bone that goes with taking a tooth out. That inclusion is the point AAOMS makes in its coding guidance: an alveoloplasty is reportable only when actual bone recontouring was needed, not when the socket edges were tidied up.
• Different quadrant, same date. Defensible on the descriptor, but it will be scrutinized. Report the quadrant explicitly and note that no extractions were performed there.
• Same quadrant, shortly after the extractions. This is the one that surprises billers. Connecticut’s Medicaid dental program applies the same not-separately-billable denial to an alveoloplasty claim submitted a short time after a surgical extraction by the same practitioner, on the reasoning that the bone work should have been part of the extraction. Waiting two weeks and rebilling does not convert a D7310 case into a D7320 case.
• A healed ridge. The clean D7320. The extractions are historical, the ridge has remodeled, and the bone work is a genuinely separate procedure with its own clinical reason.

Where D7320 sits among the four alveoloplasty codes

Two questions separate the family, and D7320 is the answer to both only in one combination.

Code	Extractions in that quadrant?	Teeth or spaces in quadrant
D7310	Yes	Four or more
D7311	Yes	One to three
D7320	No	Four or more
D7321	No	One to three

All four are reported per quadrant, and a quadrant runs from the midline to the last tooth. A full-arch ridge preparation ahead of a complete denture is commonly two D7320 lines, one per quadrant, each with its own count and its own note. Do not report it once for the arch, and do not report it per tooth space.

The count is the second-most-common miscode after the extraction axis. Four or more tooth spaces does not require four or more teeth to have been present. On a long-edentulous ridge you are counting the spaces where teeth used to be, which is usually why the four-or-more code applies.

Alveoloplasty is not the same as removing a bony lump

D7320 reshapes the ridge broadly. A discrete bony growth is its own procedure with its own code, and mixing them up is the fastest way to have a claim paid at the wrong fee or denied outright.

• D7471 is the removal of a lateral exostosis on the maxilla or mandible.
• D7472 is the removal of a torus on the hard palate. D7473 is the mandibular lingual torus.
• D7485 is reduction of a bony tuberosity. Its soft-tissue counterpart, D7972, reduces a fibrous tuberosity, and the difference is bone versus tissue, not size or location.
• D7953 is the opposite operation entirely. It places graft material to hold ridge volume, reported per site. Alveoloplasty takes bone away; a ridge preservation graft adds it.

The tori and exostosis codes are reported per site rather than per quadrant, and plans typically cap them hard. Envolve Dental’s excision-of-bone-tissue policy allows one D7471, D7472, D7473, or D7485 per site per lifetime, subject to state rules. If the surgeon removed a torus and also recontoured the ridge around it, the note has to distinguish the two procedures, or the carrier will pay the lesion code and bundle the alveoloplasty as part of the same exposure and closure.

Coverage and how carriers treat it

Coverage for D7320 is plan-dependent in both directions, and the two failure modes look identical on a remittance.

It is usually a prosthesis-driven benefit. Because alveoloplasty on a healed ridge is nearly always done to make a denture or partial fit, plans handle it the way they handle other pre-prosthetic work. Some pay it as oral surgery. Some fold it into the denture benefit so it does not pay on its own line. Some exclude ridge preparation outright.

Some plans allow it once per quadrant, for the life of the patient. Envolve Dental’s alveoloplasty policy permits one D7310, D7311, D7320, or D7321 per quadrant per lifetime, subject to state rules. That is one administrator’s limit rather than a general standard, but it is the kind of language that does not surface until a second claim on the same quadrant is denied, so read the frequency terms before you treatment-plan a revision.

Some programs cover D7320 and nothing else in the family. Connecticut’s Medicaid dental program reimburses alveoloplasty only when it is not in conjunction with extractions, and treats the with-extractions code as never covered. That is one program’s rule rather than a general one, but it shows how sharply the axis can be drawn, and it is why the quadrant detail belongs on the claim rather than in the chart alone.

Prior authorization is common. Elective bone work on a healed ridge is exactly the kind of claim plans want reviewed first. Connecticut’s HUSKY B program requires prior authorization for it. Even when a plan does not require one, a predetermination answers the patient’s question before the surgery instead of after.

Medical necessity has to be stated, not implied. UnitedHealthcare’s policy also names situations where alveoloplasty may not be indicated, including prior head and neck radiation, diminished bone volume, and medications that impair healing. A reviewer who sees none of the clinical reasoning has an easy denial.

Documentation that supports the claim

D7320 is reviewed on the narrative more than on the code. It should establish four things:

• The quadrant, and that no teeth were extracted there. State it directly. If extractions were done in another quadrant on the same date, name both quadrants so the reviewer does not have to infer it.
• The count. How many teeth or tooth spaces in the quadrant, and that the number is four or more. This is what separates D7320 from D7321.
• The bone condition and the bone work. Not “smoothed bone.” Sharp crestal bone, a buccal undercut, an irregular or knife-edge ridge, and what was reduced to correct it.
• Why now. Usually the prosthesis: an existing denture that cannot be adjusted to fit, or a new one that cannot be seated over the current ridge contour. Envolve Dental’s alveoloplasty policy is a workable template for the reasons a reviewer will accept, since it turns on reshaping bone so a prosthesis fits, preparing the ridge ahead of radiation therapy or transplant surgery, removing bone arising from a pathologic condition, or providing stability for an implant where implants are a covered benefit. The same policy states the flip side just as plainly: no prosthesis planned, no alveoloplasty.

Attach a recent panoramic image and clinical photographs of the ridge. On a standalone alveoloplasty there is no extraction to anchor the claim, so images are doing more work here than they do on a D7310.

What to get right in your PMS

The menus differ across Open Dental, Dentrix, Eaglesoft, Curve, and Carestream, but the setup that prevents these denials is the same:

1. Keep all four alveoloplasty codes distinct in the code table. D7310, D7311, D7320, and D7321 differ on only two axes. Label them by both, extractions or not and the count, so nobody picks from a single fuzzy “alveoloplasty” entry.
2. Enter one line per quadrant, with the quadrant on the line. A full-arch case is two lines. The quadrant has to reach the claim, not just the chart note.
3. Check the extraction history before the claim goes out. If the same quadrant carries recent extractions from your office, D7320 will be read as the tail end of that treatment. Know that before you bill, not after the EOB.
4. Route it through predetermination by default. Build D7320 into the treatment-planning workflow as a pre-auth code so the narrative and images get assembled once, up front, rather than after a denial.
5. Attach the narrative to the claim line, not the patient record. Many systems store notes at the patient level by default, and the clearinghouse needs the alveoloplasty narrative linked to the D7320 line itself.

For how the quadrant, the remarks field, and attachments are filled in on the claim, see the ADA dental claim form guide.