ICD-10-CM > S00-T88 > S60-S69 > S63 > S63.6 > S63.62 S63.62 Sprain of interphalangeal joint of thumb Non-Billable/Non-Specific Codes S63.621Sprain of interphalangeal joint of right thumbS63.621A..., initial encounterS63.621D..., subsequent encounterS63.621S..., sequelaS63.622Sprain of interphalangeal joint of left thumbS63.622A..., initial encounterS63.622D..., subsequent encounterS63.622S..., sequelaS63.629Sprain of interphalangeal joint of unspecified thumbS63.629A..., initial encounterS63.629D..., subsequent encounterS63.629S..., sequela