ICD-10-CM > S00-T88 > S00-S09 > S06 > S06.8 > S06.81 > S06.818 S06.818 Injury of right internal carotid artery, intracranial portion, not elsewhere classified with loss of consciousness of any duration with death due to other cause prior to regaining consciousness Non-Billable/Non-Specific Codes S06.818A..., initial encounterS06.818D..., subsequent encounterS06.818S..., sequela