ICD-10-CM > S00-T88 > S00-S09 > S06 > S06.8 > S06.82 > S06.820 S06.820 Injury of left internal carotid artery, intracranial portion, not elsewhere classified without loss of consciousness Non-Billable/Non-Specific Codes S06.820A..., initial encounterS06.820D..., subsequent encounterS06.820S..., sequela