ICD-10-CM > S00-T88 > S60-S69 > S63 > S63.6 > S63.63 > S63.638 S63.638 Sprain of interphalangeal joint of other finger Non-Billable/Non-Specific Codes S63.638A..., initial encounterS63.638D..., subsequent encounterS63.638S..., sequela