ICD-10-CM > S00-T88 > S60-S69 > S63 > S63.1 > S63.12 > S63.123 S63.123 Subluxation of interphalangeal joint of unspecified thumb Non-Billable/Non-Specific Codes S63.123A..., initial encounterS63.123D..., subsequent encounterS63.123S..., sequela