M99
⚠ Non-billable (Header)Biomechanical lesions, not elsewhere classified
Diseases of the musculoskeletal system and connective tissue (M00-M99)
⚠️ This is a category header code — not billable. Use a more specific child code below.
✅ No additional coding notes for M99
Child Codes (10)
M99.0Segmental and somatic dysfunctionM99.1Subluxation complex (vertebral)M99.2Subluxation stenosis of neural canalM99.3Osseous stenosis of neural canalM99.4Connective tissue stenosis of neural canalM99.5Intervertebral disc stenosis of neural canalM99.6Osseous and subluxation stenosis of intervertebral foraminaM99.7Connective tissue and disc stenosis of intervertebral foraminaM99.8Other biomechanical lesionsM99.9Biomechanical lesion, unspecified
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CodeM99
BillableNo — Header code
CategoryDiseases of the musculoskeletal system and connective tissue (M00-M99)
Excludes10 rule(s)
Excludes20 note(s)
Child codes10
Data Source
CMS ICD-10-CM 2026 Tabular List
Updated October 1, 2025 (FY2026)