FA20.1

ICD-11 MMS 2026-01

Seronegative rheumatoid arthritis

Index terms

  • Seronegative rheumatoid arthritis
  • rheumatoid arthritis with negative RF- [rheumatoid factor] and negative ACPA -[anticitrullinated protein antibody]
  • rheumatoid arthritis with negative serology

Exclusions from above levels

  • FA24.1 – rheumatoid arthritis, juvenile
  • http://id.who.int/icd/entity/871612151 – Acute rheumatic fever
  • 01 – Certain infectious or parasitic diseases
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  • 05 – Endocrine, nutritional or metabolic diseases
  • 18 – Complications of pregnancy, childbirth and the puerperium
  • 19 – Certain conditions originating in the perinatal period
  • 22 – Injury, poisoning or certain other consequences of external causes
  • DA0E.8 – Temporomandibular joint disorders

Sibling codes

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

Foundation entity

Seronegative rheumatoid arthritis – http://id.who.int/icd/entity/1108009158

Allowed postcoordination axes

Part of: FA20: Rheumatoid arthritis › 15: Diseases of the musculoskeletal system or connective tissue