M99.66 Osseous and subluxation stenosis of intervertebral foramina of lower extremity

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 M99.66

Back-references to M99

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

Diagnosis Index entries for M99.66

• Stenosis, stenotic (cicatricial) › intervertebral foramina › osseous › lower extremity

Nearby codes

• M99.61 Osseous and subluxation stenosis of intervertebral foramina of cervical region
• M99.62 Osseous and subluxation stenosis of intervertebral foramina of thoracic region
• M99.63 Osseous and subluxation stenosis of intervertebral foramina of lumbar region
• M99.64 Osseous and subluxation stenosis of intervertebral foramina of sacral region
• M99.65 Osseous and subluxation stenosis of intervertebral foramina of pelvic region
• M99.66 Osseous and subluxation stenosis of intervertebral foramina of lower extremity (this code)
• M99.67 Osseous and subluxation stenosis of intervertebral foramina of upper extremity
• M99.68 Osseous and subluxation stenosis of intervertebral foramina of rib cage
• M99.69 Osseous and subluxation stenosis of intervertebral foramina of abdomen and other regions
• M99.7 Connective tissue and disc stenosis of intervertebral foramina
• M99.70 Connective tissue and disc stenosis of intervertebral foramina of head region