ICD-10-CM > S00-T88 > S60-S69 > S63 > S63.6 > S63.63 > S63.636 S63.636 Sprain of interphalangeal joint of right little finger Non-Billable/Non-Specific Codes S63.636A..., initial encounterS63.636D..., subsequent encounterS63.636S..., sequela