ICD-10-CM > S00-T88 > S40-S49 > S43 > S43.2 > S43.21 > S43.212 S43.212 Anterior subluxation of left sternoclavicular joint Non-Billable/Non-Specific Codes S43.212A..., initial encounterS43.212D..., subsequent encounterS43.212S..., sequela