T86.839 — Unspecified complication of bone graft
T86.839 is a billable, specific ICD-10-CM code for unspecified complication of bone graft. It is valid for submission on a claim.
Other codes that can never be billed with T86.839
These codes carry an Excludes1 note pointing at T86.839. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading T86.839 alone.
- Z98.85Transplanted organ removal status
Risk adjustment
T86.839 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
Medicare coverage
T86.839 is named in 8 Medicare coverage policies — 8 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A52466Nebulizers - Policy Article
- A52466Nebulizers - Policy Article
- A52466Nebulizers - Policy Article
- A52466Nebulizers - Policy Article
How T86.839 is indexed
Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to T86.839.
- Complication›graft›bone
- Complication›transplant›bone
The condition this code belongs to
Every code for the condition on one page, which one applies when, and the mistake coders make with it.
Code history
T86.839 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.
Related codes at this level
Codes that share T86.83. If T86.839 is not quite right, the correct code is usually one of these.
Questions about T86.839
- Is T86.839 a billable ICD-10-CM code?
- Yes. T86.839 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does T86.839 sit in the tabular list?
- Injury, poisoning and certain other consequences of external causes (S00-T88), in the block Complications of surgical and medical care, not elsewhere classified (T80-T88).