ICD-10-CM > S00-T88 > S90-S99 > S90 > S90.4 > S90.44 S90.44 External constriction of toe Non-Billable/Non-Specific Applicable To Hair tourniquet syndrome of toe Codes S90.441External constriction, right great toeS90.441A..., initial encounterS90.441D..., subsequent encounterS90.441S..., sequelaS90.442External constriction, left great toeS90.442A..., initial encounterS90.442D..., subsequent encounterS90.442S..., sequelaS90.443External constriction, unspecified great toeS90.443A..., initial encounterS90.443D..., subsequent encounterS90.443S..., sequelaS90.444External constriction, right lesser toe(s)S90.444A..., initial encounterS90.444D..., subsequent encounterS90.444S..., sequelaS90.445External constriction, left lesser toe(s)S90.445A..., initial encounterS90.445D..., subsequent encounterS90.445S..., sequelaS90.446External constriction, unspecified lesser toe(s)S90.446A..., initial encounterS90.446D..., subsequent encounterS90.446S..., sequela