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M05.0

⚠ Non-billable (Header)

Felty's syndrome

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.

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Also Known As

Rheumatoid arthritis with splenoadenomegaly and leukopenia

❌ 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.-)

Child Codes (9)

M05.00Felty's syndrome, unspecified siteM05.01Felty's syndrome, shoulderM05.02Felty's syndrome, elbowM05.03Felty's syndrome, wristM05.04Felty's syndrome, handM05.05Felty's syndrome, hipM05.06Felty's syndrome, kneeM05.07Felty's syndrome, ankle and footM05.09Felty's syndrome, multiple sites

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Code Information

CodeM05.0
BillableNo — Header code
ParentM05
CategoryDiseases of the musculoskeletal system and connective tissue (M00-M99)
Excludes13 rule(s)
Excludes20 note(s)
Child codes9

Data Source

CMS ICD-10-CM 2026 Tabular List

Updated October 1, 2025 (FY2026)