ICD-10-CM > S00-T88 > S50-S59 > S53 > S53.4 > S53.43 > S53.439 S53.439 Radial collateral ligament sprain of unspecified elbow Non-Billable/Non-Specific Codes S53.439A..., initial encounterS53.439D..., subsequent encounterS53.439S..., sequela