ICD-10-CM > S00-T88 > S20-S29 > S23 > S23.1 > S23.13 > S23.131 S23.131 Dislocation of T4/T5 thoracic vertebra Non-Billable/Non-Specific Codes S23.131A..., initial encounterS23.131D..., subsequent encounterS23.131S..., sequela