ICD-10-CM > S00-T88 > S20-S29 > S23 > S23.1 > S23.12 > S23.123 S23.123 Dislocation of T3/T4 thoracic vertebra Non-Billable/Non-Specific Codes S23.123A..., initial encounterS23.123D..., subsequent encounterS23.123S..., sequela