ICD-10-CM > S00-T88 > S00-S09 > S06 > S06.3 > S06.30 > S06.309 S06.309 Unspecified focal traumatic brain injury with loss of consciousness of unspecified duration Non-Billable/Non-Specific Codes S06.309A..., initial encounterS06.309D..., subsequent encounterS06.309S..., sequela