ICD-10-CM > S00-T88 > S00-S09 > S00 > S00.2 > S00.22 > S00.229 S00.229 Blister (nonthermal) of unspecified eyelid and periocular area Non-Billable/Non-Specific Codes S00.229A..., initial encounterS00.229D..., subsequent encounterS00.229S..., sequela