ICD-10-CM > S00-T88 > S00-S09 > S06 > S06.8 > S06.82 > S06.827 S06.827 Injury of left internal carotid artery, intracranial portion, not elsewhere classified with loss of consciousness of any duration with death due to brain injury prior to regaining consciousness Non-Billable/Non-Specific Codes S06.827A..., initial encounterS06.827D..., subsequent encounterS06.827S..., sequela