ICD-10-CM > S00-T88 > S80-S89 > S80 > S80.8 > S80.84 S80.84 External constriction of lower leg Non-Billable/Non-Specific Codes S80.841External constriction, right lower legS80.841A..., initial encounterS80.841D..., subsequent encounterS80.841S..., sequelaS80.842External constriction, left lower legS80.842A..., initial encounterS80.842D..., subsequent encounterS80.842S..., sequelaS80.849External constriction, unspecified lower legS80.849A..., initial encounterS80.849D..., subsequent encounterS80.849S..., sequela