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M35.1

✓ Billable

Other overlap syndromes

Diseases of the musculoskeletal system and connective tissue (M00-M99)

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Also Known As

Mixed connective tissue disease

❌ Excludes1

direct

Cannot be coded with M35.1

  • • polyangiitis overlap syndrome (M30.8)

❌ Excludes1

inherited from M35

Rules from parent category M35: Other systemic involvement of connective tissue

  • • reactive perforating collagenosis (L87.1)

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Code Information

CodeM35.1
BillableYes
ParentM35
CategoryDiseases of the musculoskeletal system and connective tissue (M00-M99)
Excludes12 rule(s)
Excludes20 note(s)

Data Source

CMS ICD-10-CM 2026 Tabular List

Updated October 1, 2025 (FY2026)