M99.18 Subluxation complex (vertebral) of rib cage

Billable ICD-10-CM code, FY2026. Acts as a Complication or Comorbidity (CC) as a secondary diagnosis.

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) 183-185 in MDC 04.

Approximate ICD-9-CM (GEMs)

• 839.61 Closed dislocation, sternum (approximate)

Code annotations containing back-references to M99.18

Back-references to M99

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

Diagnosis Index entries for M99.18

• Complex › subluxation (vertebral) › costochondral
• Complex › subluxation (vertebral) › costovertebral
• Complex › subluxation (vertebral) › rib cage
• Complex › subluxation (vertebral) › sternochondral

Nearby codes

• 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
• M99.18 Subluxation complex (vertebral) of rib cage (this code)
• M99.19 Subluxation complex (vertebral) of abdomen and other regions
• M99.2 Subluxation stenosis of neural canal
• M99.20 Subluxation stenosis of neural canal of head region
• M99.21 Subluxation stenosis of neural canal of cervical region
• M99.22 Subluxation stenosis of neural canal of thoracic region