ICD-10-CM > S00-T88 > S40-S49 > S43 > S43.2 > S43.22 > S43.222 S43.222 Posterior subluxation of left sternoclavicular joint Non-Billable/Non-Specific Codes S43.222A..., initial encounterS43.222D..., subsequent encounterS43.222S..., sequela