ICD-10-CM > S00-T88 > S90-S99 > S90 > S90.8 > S90.84 S90.84 External constriction of foot Non-Billable/Non-Specific Codes S90.841External constriction, right footS90.841A..., initial encounterS90.841D..., subsequent encounterS90.841S..., sequelaS90.842External constriction, left footS90.842A..., initial encounterS90.842D..., subsequent encounterS90.842S..., sequelaS90.849External constriction, unspecified footS90.849A..., initial encounterS90.849D..., subsequent encounterS90.849S..., sequela