ICD-10-CM > S00-T88 > S50-S59 > S53 > S53.4 > S53.44 > S53.449 S53.449 Ulnar collateral ligament sprain of unspecified elbow Non-Billable/Non-Specific Codes S53.449A..., initial encounterS53.449D..., subsequent encounterS53.449S..., sequela