D4285 is the CDT code for each additional contiguous tooth, implant, or edentulous tooth position treated in a non-autogenous connective tissue graft, reported alongside D4275 for the first position, with the donor material included in the fees.
Three connective-and-free graft families each carry their own add-on code, and D4285 belongs to exactly one of them: the donor-material graft billed as D4275. Mixed pairs are the recurring error, and they carry real consequences: an autogenous add-on under a non-autogenous parent asserts a palatal harvest on a claim whose parent code says there was none, and that contradiction gets the claim pulled for records.
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 fold the donor material into the fee: 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.
What makes the crossed pair worse than a typo is the internal contradiction. D4283’s fee structure includes donor-site surgery; billing it under a D4275 parent claims harvest work on a case whose parent code says the tissue came out of a package. A reviewer who notices does not fix one line; they request the operative note and re-adjudicate the claim.
The two graft codes with no positional structure sit outside the grid: the pedicle graft D4270 has no add-on at all, and the combined connective tissue and double pedicle graft D4276 is its own per-tooth unit.
Counting the positions
- One continuous graft site, positions listed from the operative note.
- First position: D4275, once.
- Each additional position that is contiguous, directly adjacent, with teeth, implants, and edentulous tooth positions all counting, is one D4285.
- A skipped, untreated position ends the site. The next treated area starts over with its own D4275.
- Line count check: 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/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, rather than 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 regardless of how correctly it is coded. This is contract language, not a claim error: find it at verification, and set the patient’s estimate accordingly.
Documentation that supports the claim
- Operative note describing one continuous graft, the product used with lot number, and every position treated.
- Per-position mucogingival measurements where the plan reviews against thresholds.
- Position identifiers 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 that keeps the patient-balance conversation honest.
What to get right in your PMS
- Hard-link D4285 to a same-claim D4275 and block the crossed pairs at entry.
- Require a tooth or position number on every add-on line.
- Price the add-on realistically in estimates. Allowances for additional positions run well below the parent fee on most contracts, and single-tooth-benefit language can zero them; a patient quoted parent-fee-times-positions will be surprised in the wrong direction.
- Keep material lot documentation with the visit record, since the non-autogenous family’s audit trail runs through the product log.
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 gets 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, however many that is. A donor-material graft spanning four contiguous positions is D4275 plus three D4285 lines. The ceiling in practice is set by the plan, not the code: some contracts benefit graft procedures on a single-tooth basis or cap perio surgery per site per multi-year window, so multi-position allowances are worth confirming in a pre-authorization.
- Does D4285 include the graft material?
- Yes. Like its parent, the code's fee includes the donor material along with the recipient-site surgery at that position. There is no separate billable line for the additional square millimeters of dermal matrix an extra position consumes, 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.