Excludes1 pair
S09.0- vs S15-
S09.0 and S15 are not coded together. ICD-10-CM declares them mutually exclusive with an Excludes1 note — the two conditions are not expected to occur together, so exactly one of them is normally correct for a given encounter. The Official Guidelines carve out one exception: if the two conditions are clearly unrelated to each other, both may be reported.
The official note, declared on S09.0
injury of precerebral blood vessels (S15.-)
S09.0
Injury of blood vessels of head, not elsewhere classified
Not billable
- Chapter 19
- Injury, poisoning and certain other consequences of external causes
- Section
- S00-S09
Indexed under
- Injury › blood vessel NEC › head
- Injury › blood vessel NEC › head › multiple
S15
Injury of blood vessels at neck level
Not billable
- Chapter 19
- Injury, poisoning and certain other consequences of external causes
- Section
- S10-S19
Excludes1 is not always absolute: where two conditions covered by the note are genuinely unrelated, CMS guidance permits reporting both. Document the reasoning rather than assuming it. More on Excludes1 vs Excludes2 · FY2027