T65.843S — Toxic effect of xylazine, assault, sequela
T65.843S is a billable, specific ICD-10-CM code for toxic effect of xylazine, assault, sequela. It is valid for submission on a claim.
7th character "S" — sequela
The appropriate 7th character is to be added to each code from category T65
- A
- initial encounter
- D
- subsequent encounter
- S
- sequela
Risk adjustment
T65.843S 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
T65.843S is named in 1 Medicare coverage policy — 1 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A56612Billing and Coding: CT of the Head
Code history
What changed, and when. Derived by diffing consecutive CMS release files — which matters when you are defending a code assigned under an earlier edition.
- addedFY2024-FY2026
Toxic effect of xylazine, assault, sequela
Related codes at this level
Codes that share T65.843. If T65.843S is not quite right, the correct code is usually one of these.
Questions about T65.843S
- Is T65.843S a billable ICD-10-CM code?
- Yes. T65.843S is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does T65.843S sit in the tabular list?
- Injury, poisoning and certain other consequences of external causes (S00-T88), in the block Toxic effects of substances chiefly nonmedicinal as to source (T51-T65).