M99.0
⚠ Non-billable (Header)Segmental and somatic dysfunction
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 M99.0
Child Codes (10)
M99.00Segmental and somatic dysfunction of head regionM99.01Segmental and somatic dysfunction of cervical regionM99.02Segmental and somatic dysfunction of thoracic regionM99.03Segmental and somatic dysfunction of lumbar regionM99.04Segmental and somatic dysfunction of sacral regionM99.05Segmental and somatic dysfunction of pelvic regionM99.06Segmental and somatic dysfunction of lower extremityM99.07Segmental and somatic dysfunction of upper extremityM99.08Segmental and somatic dysfunction of rib cageM99.09Segmental and somatic dysfunction of abdomen and other regions
🧪 Validate Combinations
Add M99.0 to the Excludes Checker to validate against your full code list.
Open in Checker →Code Information
CodeM99.0
BillableNo — Header code
ParentM99
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)