MCMCB Pro
S15.9XXS

S15.9XXSInjury of unspecified blood vessel at neck level, sequela

Billable / specific codeICD-10-CMPOA exempt

S15.9XXS is a billable, specific ICD-10-CM code for injury of unspecified blood vessel at neck level, 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 S15

A
initial encounter
D
subsequent encounter
S
sequela

Risk adjustment

S15.9XXS 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

S15.9XXS is named in 2 Medicare coverage policies 2 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

  • A54111Billing and Coding: Speech Language Pathology (SLP) Services: Communication Disorders
  • A56631Billing and Coding: Thoracic Aortography and Carotid, Vertebral, and Subclavian Angiography

Related codes at this level

Codes that share S15.9. If S15.9XXS is not quite right, the correct code is usually one of these.

Questions about S15.9XXS

Is S15.9XXS a billable ICD-10-CM code?
Yes. S15.9XXS is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does S15.9XXS 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).
ICD-10-CMFY2026-Apr· effective April 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release — see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.