S15.9XXA — Injury of unspecified blood vessel at neck level, initial encounter
S15.9XXA is a billable, specific ICD-10-CM code for injury of unspecified blood vessel at neck level, 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 S15
- A
- initial encounter
- D
- subsequent encounter
- S
- sequela
Other codes that can never be billed with S15.9XXA
These codes carry an Excludes1 note pointing at S15.9XXA. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading S15.9XXA alone.
- S09.0Injury of blood vessels of head, not elsewhere classified
- S09.0XXAInjury of blood vessels of head, not elsewhere classified, initial encounter
- S09.0XXDInjury of blood vessels of head, not elsewhere classified, subsequent encounter
- S09.0XXSInjury of blood vessels of head, not elsewhere classified, sequela
Risk adjustment
S15.9XXA 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
S15.9XXA 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.
- A56631Billing and Coding: Thoracic Aortography and Carotid, Vertebral, and Subclavian Angiography
Code history
S15.9XXA 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 S15.9. If S15.9XXA is not quite right, the correct code is usually one of these.
Questions about S15.9XXA
- Is S15.9XXA a billable ICD-10-CM code?
- Yes. S15.9XXA is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does S15.9XXA sit in the tabular list?
- Injury, poisoning and certain other consequences of external causes (S00-T88), in the block Injuries to the neck (S10-S19).