ICD-10-CM > S00-T88 > S60-S69 > S60 > S60.3 > S60.34 S60.34 External constriction of thumb Non-Billable/Non-Specific Applicable To Hair tourniquet syndrome of thumb Use Additional cause code to identify the constricting item (W49.0-) Codes S60.341External constriction of right thumbS60.341A..., initial encounterS60.341D..., subsequent encounterS60.341S..., sequelaS60.342External constriction of left thumbS60.342A..., initial encounterS60.342D..., subsequent encounterS60.342S..., sequelaS60.349External constriction of unspecified thumbS60.349A..., initial encounterS60.349D..., subsequent encounterS60.349S..., sequela