ICD-10-CM > S00-T88 > S80-S89 > S80 > S80.8 > S80.82 S80.82 Blister (nonthermal) of lower leg Non-Billable/Non-Specific Codes S80.821Blister (nonthermal), right lower legS80.821A..., initial encounterS80.821D..., subsequent encounterS80.821S..., sequelaS80.822Blister (nonthermal), left lower legS80.822A..., initial encounterS80.822D..., subsequent encounterS80.822S..., sequelaS80.829Blister (nonthermal), unspecified lower legS80.829A..., initial encounterS80.829D..., subsequent encounterS80.829S..., sequela