ICD-10-CM > S00-T88 > S20-S29 > S23 > S23.1 > S23.10 S23.10 Subluxation and dislocation of unspecified thoracic vertebra Non-Billable/Non-Specific Codes S23.100Subluxation of unspecified thoracic vertebraS23.100A..., initial encounterS23.100D..., subsequent encounterS23.100S..., sequelaS23.101Dislocation of unspecified thoracic vertebraS23.101A..., initial encounterS23.101D..., subsequent encounterS23.101S..., sequela