ICD-10-CM > S00-T88 > S50-S59 > S53 > S53.1 > S53.12 > S53.123 S53.123 Posterior subluxation of unspecified ulnohumeral joint Non-Billable/Non-Specific Codes S53.123A..., initial encounterS53.123D..., subsequent encounterS53.123S..., sequela