M99.78 Connective tissue and disc stenosis of intervertebral foramina of rib cage

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)

• 724.09 Spinal stenosis, other region (approximate)

Code annotations containing back-references to M99.78

Back-references to M99

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

Diagnosis Index entries for M99.78

• Stenosis, stenotic (cicatricial) › intervertebral foramina › disc › rib cage

Nearby codes

• M99.73 Connective tissue and disc stenosis of intervertebral foramina of lumbar region
• M99.74 Connective tissue and disc stenosis of intervertebral foramina of sacral region
• M99.75 Connective tissue and disc stenosis of intervertebral foramina of pelvic region
• M99.76 Connective tissue and disc stenosis of intervertebral foramina of lower extremity
• M99.77 Connective tissue and disc stenosis of intervertebral foramina of upper extremity
• M99.78 Connective tissue and disc stenosis of intervertebral foramina of rib cage (this code)
• M99.79 Connective tissue and disc stenosis of intervertebral foramina of abdomen and other regions
• M99.8 Other biomechanical lesions
• M99.80 Other biomechanical lesions of head region
• M99.81 Other biomechanical lesions of cervical region
• M99.82 Other biomechanical lesions of thoracic region