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 reshaping. The surgeon reflects a flap, reduces and smooths the bone, and closes.

Two conditions have to hold:

• No extractions in that quadrant. If teeth are coming out of the quadrant being reshaped, the code is D7310 or D7311.
• Four or more teeth or tooth spaces in the quadrant. The count is per quadrant and 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 indication 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 elsewhere in the mouth on the same date. Carriers read it more tightly, and that is where the denials come from.

• Same quadrant, same date. Not payable as D7320. The alveoloplasty is 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. AAOMS coding guidance makes the same point: 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. 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.
• A healed ridge. The clean D7320. The extractions are historical, the ridge has remodeled, and the bone work is a separate procedure with its own clinical reason.

Where D7320 sits among the four alveoloplasty codes

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 note. Do not report it once for the arch or 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 count 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 has its own code, and mixing them up gets a claim paid at the wrong fee or denied.

• 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; the difference is bone versus tissue, not size or location.
• D7953 is the opposite operation. 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 surrounding ridge, 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

It is usually a prosthesis-driven benefit. Alveoloplasty on a healed ridge is nearly always done to make a denture or partial fit, so plans treat it like other pre-prosthetic work. Some pay it as oral surgery, some fold it into the denture benefit, and some exclude ridge preparation outright. A benefit exclusion and a documentation gap look the same on a remittance, so read the EOB language before appealing.

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, not a general standard, but language like it usually surfaces only when a second claim on the same quadrant is denied. Read the frequency terms before treatment-planning 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 never covers the with-extractions codes. That is one program’s rule, but it shows why the quadrant detail belongs on the claim rather than only in the chart.

Prior authorization is common. Connecticut’s HUSKY B program requires it for D7320. Even when a plan does not, a predetermination with the narrative and images, built into treatment planning, answers the coverage question before 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 no clinical reasoning has an easy denial.

Documentation that supports the claim

D7320 is reviewed on the narrative more than the code. Before the claim goes out, check the extraction history: if the same quadrant carries recent extractions from your office, expect D7320 to be read as the end of that treatment. The narrative should establish four things:

• The quadrant, and that no teeth were extracted there. 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.
• 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. Envolve Dental’s alveoloplasty policy is a workable template for reasons a reviewer will accept: 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 reverse just as plainly: no prosthesis planned, no alveoloplasty.

Attach a recent panoramic image and clinical photographs of the ridge. A standalone alveoloplasty has no extraction to anchor the claim, so images carry more weight than on a D7310. Link the narrative to the D7320 claim line itself, not only the patient record, and put the quadrant on the line. For how the quadrant, the remarks field, and attachments are filled in, see the ADA dental claim form guide.