Rheumatoid arthritis

Description

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.

Excludes

FA24.1 – rheumatoid arthritis, juvenile
http://id.who.int/icd/entity/871612151 – Acute rheumatic fever

Exclusions from above levels

01 – Certain infectious or parasitic diseases
05 – Endocrine, nutritional or metabolic diseases
18 – Complications of pregnancy, childbirth and the puerperium

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19 – Certain conditions originating in the perinatal period
22 – Injury, poisoning or certain other consequences of external causes
DA0E.8 – Temporomandibular joint disorders

Child codes

FA20.0 – Seropositive rheumatoid arthritis
FA20.1 – Seronegative rheumatoid arthritis
FA20.Z – Rheumatoid arthritis, serology unspecified

Sibling codes

FA21 – Psoriatic arthritis
FA22 – Polymyalgia rheumatica
FA23 – Adult-onset Still disease
FA24 – Juvenile idiopathic arthritis
FA25 – Gout
FA26 – Certain specified crystal arthropathies
FA27 – Certain specified inflammatory arthropathies
FA2Z – Inflammatory arthropathies, unspecified

Foundation entity

Rheumatoid arthritis – http://id.who.int/icd/entity/576319925

Allowed postcoordination axes

Part of: 15: Diseases of the musculoskeletal system or connective tissue