ICD-10-CM > S00-T88 > S10-S19 > S15 > S15.1 > S15.10 > S15.109 S15.109 Unspecified injury of unspecified vertebral artery Non-Billable/Non-Specific Codes S15.109A..., initial encounterS15.109D..., subsequent encounterS15.109S..., sequela