M05
⚠ Non-billable (Header)Rheumatoid arthritis with rheumatoid factor
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.
❌ Excludes1
directCannot be coded with M05
- • rheumatic fever (I00)
- • juvenile rheumatoid arthritis (M08.-)
- • rheumatoid arthritis of spine (M45.-)
Child Codes (11)
M05.0Felty's syndromeM05.1Rheumatoid lung disease with rheumatoid arthritisM05.2Rheumatoid vasculitis with rheumatoid arthritisM05.3Rheumatoid heart disease with rheumatoid arthritisM05.4Rheumatoid myopathy with rheumatoid arthritisM05.5Rheumatoid polyneuropathy with rheumatoid arthritisM05.6Rheumatoid arthritis with involvement of other organs and systemsM05.7Rheumatoid arthritis with rheumatoid factor without organ or systems involvementM05.8Other rheumatoid arthritis with rheumatoid factorM05.9Rheumatoid arthritis with rheumatoid factor, unspecifiedM05.AAbnormal rheumatoid factor and anti-citrullinated protein antibody with rheumatoid arthritis
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CodeM05
BillableNo — Header code
CategoryDiseases of the musculoskeletal system and connective tissue (M00-M99)
Excludes13 rule(s)
Excludes20 note(s)
Child codes11
Data Source
CMS ICD-10-CM 2026 Tabular List
Updated October 1, 2025 (FY2026)