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M05.9

✓ Billable

Rheumatoid arthritis with rheumatoid factor, unspecified

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

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❌ Excludes1

inherited from M05

Rules from parent category M05: Rheumatoid arthritis with rheumatoid factor

  • • rheumatic fever (I00)
  • • juvenile rheumatoid arthritis (M08.-)
  • • rheumatoid arthritis of spine (M45.-)

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Code Information

CodeM05.9
BillableYes
ParentM05
CategoryDiseases of the musculoskeletal system and connective tissue (M00-M99)
Excludes13 rule(s)
Excludes20 note(s)

Data Source

CMS ICD-10-CM 2026 Tabular List

Updated October 1, 2025 (FY2026)