ICD-10-CM > S00-T88 > S00-S09 > S00 > S00.2 > S00.22 S00.22 Blister (nonthermal) of eyelid and periocular area Non-Billable/Non-Specific Codes S00.221Blister (nonthermal) of right eyelid and periocular areaS00.221A..., initial encounterS00.221D..., subsequent encounterS00.221S..., sequelaS00.222Blister (nonthermal) of left eyelid and periocular areaS00.222A..., initial encounterS00.222D..., subsequent encounterS00.222S..., sequelaS00.229Blister (nonthermal) of unspecified eyelid and periocular areaS00.229A..., initial encounterS00.229D..., subsequent encounterS00.229S..., sequela