ICD-10-CM > S00-T88 > S60-S69 > S63 > S63.6 > S63.63 > S63.634 S63.634 Sprain of interphalangeal joint of right ring finger Non-Billable/Non-Specific Codes S63.634A..., initial encounterS63.634D..., subsequent encounterS63.634S..., sequela