ICD-10-CM > S00-T88 > S50-S59 > S53 > S53.4 > S53.42 > S53.421 S53.421 Ulnohumeral (joint) sprain of right elbow Non-Billable/Non-Specific Codes S53.421A..., initial encounterS53.421D..., subsequent encounterS53.421S..., sequela