S55.801A — Unspecified injury of other blood vessels at forearm level, right arm, initial encounter
S55.801A is a billable, specific ICD-10-CM code for unspecified injury of other blood vessels at forearm level, right arm, initial encounter. It is valid for submission on a claim.
7th character "A" — initial encounter
The appropriate 7th character is to be added to each code from category S55
- A
- initial encounter
- D
- subsequent encounter
- S
- sequela
Excludes2 inherited from the categories above S55.801A
Also inherited, and the opposite of Excludes1: these conditions are not part of S55.801A, but a patient can have both, so you may code both.
Risk adjustment
S55.801A 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
S55.801A 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.
- A56758Billing and Coding: Non-Invasive Vascular Studies
Code history
S55.801A 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 S55.801. If S55.801A is not quite right, the correct code is usually one of these.
Questions about S55.801A
- Is S55.801A a billable ICD-10-CM code?
- Yes. S55.801A is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does S55.801A sit in the tabular list?
- Injury, poisoning and certain other consequences of external causes (S00-T88), in the block Injuries to the elbow and forearm (S50-S59).