D7230 Dental Code: Partially Bony Impaction Removal Billing Guide

What D7230 covers

D7230 reports the removal of an impacted tooth where part of the crown is covered by bone. The dentist elevates a mucoperiosteal flap and removes bone to access and deliver the tooth. It is the middle of the impaction codes: more involved than a soft tissue impaction because bone removal is required, less than a completely bony impaction because the crown is not fully encased.

Most D7230 cases are third molars, though the code applies to any partially bony impaction.

It does not cover:

• An impaction covered only by soft tissue, with a flap but no bone removal. That is D7220.
• An impaction where the crown is essentially encased in bone. That is D7240, or D7241 with unusual surgical complications.
• A fully erupted tooth requiring a flap, bone removal, or sectioning. That is D7210.
• A simple extraction by elevation or forceps. That is D7140.

The defining fact is partial bony coverage of the crown, with flap access and bone removal.

How the impaction codes are distinguished

The impaction codes separate by what covers the tooth, documented at the procedure. They are not ranked by difficulty.

• D7220 soft tissue: occlusal surface under gum tissue. Flap, no bone removal.
• D7230 partially bony: part of the crown under bone. Flap plus bone removal.
• D7240 completely bony: crown essentially encased in bone. Flap plus more extensive bone removal.
• D7241 completely bony with unusual surgical complications: atypical anatomy, deep nerve involvement, or other documented difficulty.

D7230 sits in the middle, which is why claims move in both directions. The note has to record the bone removal that lifts it above D7220, without overstating the bone coverage into a D7240 the film does not support.

When to bill D7230

Bill D7230 when:

• The tooth is impacted with part of the crown covered by bone.
• A flap was elevated and bone was removed to access the tooth.
• The crown was not essentially encased in bone (which would be D7240).

Do not bill D7230 for:

• A soft tissue impaction with no bone removal. Use D7220.
• A completely bony impaction. Use D7240 or D7241.
• A fully erupted tooth needing surgical access. Use D7210.

Top reasons D7230 gets denied or reclassified

1. Reclassified to D7220. The carrier read the film as soft tissue only, or the note never recorded bone removal, so it paid at the lower allowable. The operative report documenting the bone removal is the defense.
2. Documentation missing. No radiograph showing partial bony coverage, no description of the bone removed. The carrier cannot confirm the classification.
3. Coverage limits on asymptomatic cases. Some plans restrict benefits for asymptomatic impactions or apply only the dental benefit. This is plan language.
4. Wrong payer first. On cases with a medical indication, the claim may belong to medical first. Billing dental first creates rework.

Medical and dental crossover

Partially bony impactions frequently cross into medical coverage. Medical plans more often pay when there is a documented medical indication: symptoms, infection, an associated cyst or pathology, or interference with a planned medical procedure such as cardiac surgery, transplant preparation, or radiation therapy.

When medical applies, it is usually billed first as primary, with dental secondary for any remaining benefit. The medical claim uses CPT codes; the dental claim uses the D7230 line. The two process independently, and whatever the patient owes after both adjudicate depends on the plans’ coordination-of-benefits rules. Whether a case qualifies for medical, and which payer is primary, is plan-dependent and should be verified before treatment planning.

Documentation that supports the claim

The claim is stronger with:

• A radiograph, often panoramic, showing the partial bony coverage of the crown.
• An operative note recording the flap and the bone removal.
• The clinical indication, especially when seeking medical coverage.

For the patient record, document:

• The tooth number and impaction status.
• That part of the crown was covered by bone.
• The flap elevation and the bone removal performed.
• Any symptoms, pathology, or medical indication.

The sentence that supports the code names the bone: “Tooth 1 impacted with the mesial portion of the crown covered by bone; flap elevated and buccal bone removed to expose and deliver the tooth.” That framing supports D7230 and separates it from both D7220 and D7240.

Example case

A 22-year-old established patient has tooth 16, an upper wisdom tooth with part of the crown covered by bone on the panoramic film. The dentist elevates a flap, removes overlying bone, delivers the tooth, and closes.

Billing steps:

1. Take a panoramic radiograph showing the partial bony coverage.
2. Verify whether a medical indication makes this medical-primary under the patient’s plans.
3. Code D7230 with an operative note recording the flap and the bone removal.
4. Attach the film. If medical applies, bill medical first and dental secondary.
5. If the carrier reclassifies to D7220, appeal with the operative report documenting the bone removal and the film showing bony coverage.

What to get right in your PMS

1. Record the bone removal in the operative note. It is what separates D7230 from D7220, and the carrier reads the note before the film.
2. Match the code to the bone coverage, not the difficulty. Partial bony coverage with bone removal is D7230, even on an otherwise routine case.
3. Check medical eligibility before treatment on symptomatic cases. Billing the wrong payer first creates rework.
4. Attach the panoramic film to the claim. It supports the impaction classification and the allowable.