ICD-11 classes
15 Diseases of the musculoskeletal system or connective...
Arthropathies
Inflammatory arthropathies
FA20 — Rheumatoid arthritis

ICD-11 FA20 — Rheumatoid arthritis

Rheumatoid arthritis (RA) is persistent and/or erosive disease that is defined as the confirmed presence of synovitis in at least 1 joint, absence of an alternative diagnosis that better explains the synovitis, and achievement of a total score of 6 or greater (of a possible 10) from the individual scores in 4 domains: number and site of involved joints, serologic abnormality, elevated acute-phase response, and symptom duration.

The diagnosis includes nothing.

It excludes 2 items.

  • rheumatoid arthritis, juvenile (FA24.1)
  • Acute rheumatic fever (1B40-1B42)

Diagnosis with code FA20 contains 3 clarifying diagnoses:

  1. FA20.0 — Seropositive rheumatoid arthritis
  2. FA20.1 — Seronegative rheumatoid arthritis
  3. FA20.Z — Rheumatoid arthritis, serology unspecified

The diagnosis is coded elsewhere:

The diagnosis is included in 1 another class.

  • Respiratory disorders in rheumatoid arthritis (CB05.1)

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