M99.12 Subluxation complex (vertebral) of thoracic region

Billable ICD-10-CM code, FY2026.

Applies from M99 Biomechanical lesions, not elsewhere classified

Notes

• This category should not be used if the condition can be classified elsewhere.

MS-DRG index

Defines the logic of DRG(s) 551-552 in MDC 08.

Approximate ICD-9-CM (GEMs)

• 839.21 Closed dislocation, thoracic vertebra (approximate)

Code annotations containing back-references to M99.12

Back-references to M99

• Type 1 Excludes: M43.5 Other recurrent vertebral dislocation ("biomechanical lesions NEC (M99.-)")

Diagnosis Index entries for M99.12

• Complex › subluxation (vertebral) › thoracic region
• Complex › subluxation (vertebral) › thoracolumbar

Nearby codes

• M99.08 Segmental and somatic dysfunction of rib cage
• M99.09 Segmental and somatic dysfunction of abdomen and other regions
• M99.1 Subluxation complex (vertebral)
• M99.10 Subluxation complex (vertebral) of head region
• M99.11 Subluxation complex (vertebral) of cervical region
• M99.12 Subluxation complex (vertebral) of thoracic region (this code)
• M99.13 Subluxation complex (vertebral) of lumbar region
• M99.14 Subluxation complex (vertebral) of sacral region
• M99.15 Subluxation complex (vertebral) of pelvic region
• M99.16 Subluxation complex (vertebral) of lower extremity
• M99.17 Subluxation complex (vertebral) of upper extremity