D7321 — Alveoloplasty NOT in conjunction with extractions — 1 to 3 teeth/spaces per quadrant

What the code commits to

Extent — one to three teeth in the quadrant. One to three teeth is the limited version: an isolated area within the quadrant rather than the whole segment. The fee is lower, and using the full-quadrant code instead is the single most common overbilling error in this part of the code set.

Timing — a separate operation. This is the code for reshaping done after the extraction sites have healed, which means opening the gum again as its own procedure. It carries a higher fee than the same work done alongside extractions, and it is the one payers question, because a plan will ask why the ridge was not contoured at the time.

Counted — per quadrant. Treating the whole mouth produces four separate line items, and most plans cap how many quadrants they will pay for at one visit.

D7321 against the codes beside it

D7320 — Alveoloplasty NOT in conjunction with extractions — 4+ teeth/spaces per quadrant: It is the same treatment on four or more teeth in the quadrant rather than one to three teeth in the quadrant — the distinction decides which of the two is the correct claim.

D7311 — Alveoloplasty in conjunction with extractions — 1 to 3 teeth/spaces per quadrant: It is the same reshaping at the same extent, done at the extraction visit itself, which is cheaper and far more likely to be covered than a later operation.

D7310 — Alveoloplasty in conjunction with extractions — 4+ teeth/spaces per quadrant: It is the same reshaping, done at the extraction visit itself, which is cheaper and far more likely to be covered than a later operation. It also applies to four or more teeth in the quadrant rather than one to three teeth in the quadrant.

D7471 — Removal of lateral exostosis (maxilla or mandible): It removes an exostosis — a bony lump on the outer surface of the upper or lower jaw — that rubs under a denture or a lip.

D7321 sits in a group of eleven codes in total; the remainder are linked at the foot of this page. A plan reads these codes as definitions, not as descriptions. If the notes for the visit do not match D7321 exactly, the claim is assessed as whichever of these the notes do match.