ICD-10-CM > S00-T88 > S00-S09 > S09 > S09.0 S09.0 Injury of blood vessels of head, not elsewhere classified Non-Billable/Non-Specific Type 1 Excludes injury of cerebral blood vessels (S06.-)injury of precerebral blood vessels (S15.-) Codes S09.0XXA..., initial encounterS09.0XXD..., subsequent encounterS09.0XXS..., sequela