S64.91XS — Injury of unspecified nerve at wrist and hand level of right arm, sequela
S64.91XS is a billable, specific ICD-10-CM code for injury of unspecified nerve at wrist and hand level of right arm, 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 S64
- A
- initial encounter
- D
- subsequent encounter
- S
- sequela
Risk adjustment
S64.91XS 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
S64.91XS 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.
- A53057Billing and Coding: Home Health Occupational Therapy
- A53064Billing and Coding: Outpatient Occupational Therapy
- A53065Billing and Coding: Outpatient Physical Therapy
- A54969Billing and Coding: Nerve Conduction Studies and Electromyography
Code history
S64.91XS 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 S64.91. If S64.91XS is not quite right, the correct code is usually one of these.
Questions about S64.91XS
- Is S64.91XS a billable ICD-10-CM code?
- Yes. S64.91XS is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does S64.91XS sit in the tabular list?
- Injury, poisoning and certain other consequences of external causes (S00-T88), in the block Injuries to the wrist, hand and fingers (S60-S69).