ICD-10-CM > S00-T88 > S60-S69 > S63 > S63.2 > S63.22 > S63.221 S63.221 Subluxation of unspecified interphalangeal joint of left index finger Non-Billable/Non-Specific Codes S63.221A..., initial encounterS63.221D..., subsequent encounterS63.221S..., sequela