D4285 is the CDT code for each additional contiguous tooth, implant, or edentulous position in a connective tissue graft made with processed donor material.
- When to use: One continuous donor material graft billed as D4275 extends to neighboring positions, so each touching position after the first gets one D4285.
- When not to use: The add-on for the patient's own tissue is D4283, the add-on for a free gingival graft is D4278, and a separate site starts over with D4275.
- Billing note: Some contracts benefit grafts on a single tooth basis, so confirm at verification what the added positions will pay before quoting the patient.
What D4285 covers
D4285 reports each additional contiguous tooth, implant, or edentulous tooth position in a connective tissue graft performed with processed donor material. The first position of that graft is billed as D4275; every touching position after it in the same continuous graft site is one D4285 line. Both codes include the donor material in the fee, so a wider matrix sheet for a longer span is more product cost inside your fee, not a new claim line.
The pairing grid, from the non-autogenous side
The add-on follows the parent’s donor source:
- D4275 → D4285. Processed donor material (acellular dermal matrix, allograft, xenograft). No harvest anywhere in the case.
- D4273 → D4283. Patient’s own connective tissue, palatal harvest included in the parent fee.
- D4277 → D4278. Free epithelialized graft, the surface-placement procedure.
A crossed pair is an internal contradiction, not a typo. D4283’s fee structure includes donor-site surgery, so billing it under a D4275 parent claims harvest work on a case whose parent code says the tissue came from a package. A reviewer who notices requests the operative note and re-adjudicates the whole claim.
Two graft codes have no positional structure: the pedicle graft D4270 has no add-on, and the combined connective tissue and double pedicle graft D4276 is its own per-tooth unit.
Counting the positions
- List the positions in one continuous graft site from the operative note.
- First position: D4275, once.
- Each additional contiguous position is one D4285. Contiguous means directly adjacent, and teeth, implants, and edentulous tooth positions all count.
- A skipped, untreated position ends the site. The next treated area starts over with its own D4275.
- Check the line count: D4275 lines plus D4285 lines equals positions grafted.
Common denials
- Orphaned or crossed add-on. No D4275 parent on the claim, or a D4283 where the D4285 belongs. Both read as construction errors and pend for records.
- Contiguity not documented. Add-on lines without position identifiers, or spanning a gap. The narrative should name each position in order.
- Material double-billed. A product line or a biologic-materials code added for the matrix. The material is inside the D4275 and D4285 fees, and plans with published mucogingival policies deny the separate line as inclusive.
- Criteria applied at the added positions. Plans reviewing against recession and attached-gingiva thresholds can approve the first position and question the span. Charting that shows the deficiency at each grafted position, not only the worst tooth, carries the add-ons.
- Single-tooth benefit contracts. Some group contracts benefit graft procedures on a single-tooth basis, which caps what a long span pays however correctly it is coded. This is contract language, not a claim error: find it at verification and set the patient’s estimate accordingly. Even without it, allowances for additional positions run well below the parent fee on most contracts, so an estimate of parent fee times positions overstates what the plan pays.
Documentation that supports the claim
- An operative note describing one continuous graft, the product used with its lot number, and every position treated. Keep the lot record with the visit, since this family’s audit trail runs through the product log.
- Per-position mucogingival measurements where the plan reviews against thresholds.
- A tooth or position identifier on each D4285 line, so the claim reconciles against the note without a records request.
- The pre-authorization showing how the plan priced the additional positions, the number the patient-balance conversation should rest on.
FAQs
- When do I use D4285 instead of D4283?
- Match the add-on to the parent. If the first position was billed as D4275 because the graft used processed donor material, every additional contiguous position is D4285. If the first position was D4273 because the tissue was harvested from the patient, the add-on is D4283. One graft has one donor source, so one claim should never carry add-ons from both families.
- Can D4285 be billed without D4275 on the claim?
- No. It reports an additional position in a graft whose first position is the D4275 line, so an add-on with no parent is rejected or pended. If only one position received the donor-material graft, the whole procedure is a single D4275.
- How many D4285 lines can one graft have?
- One per additional contiguous tooth, implant, or edentulous tooth position in the same graft site. A donor-material graft spanning four contiguous positions is D4275 plus three D4285 lines. In practice the plan sets the ceiling: some contracts benefit graft procedures on a single-tooth basis or cap perio surgery per site per multi-year window, so confirm multi-position allowances in a pre-authorization.
- Does D4285 include the graft material?
- Yes. As with its parent, the fee includes the donor material along with the recipient-site surgery at that position. The extra dermal matrix an added position consumes is not a separate billable line, and published carrier policy language declines to pay dermal-matrix materials separately alongside soft tissue grafting.
Related codes
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CDT codes are maintained by the American Dental Association. This page is an editorial billing guide, not the official ADA code descriptor. Verify current coverage policies with each carrier before submitting claims.