ICD-10-CM > S00-T88 > S40-S49 > S43 > S43.2 > S43.21 > S43.213 S43.213 Anterior subluxation of unspecified sternoclavicular joint Non-Billable/Non-Specific Codes S43.213A..., initial encounterS43.213D..., subsequent encounterS43.213S..., sequela