FA11

ICD-11 MMS 2026-01

Reactive arthropathies

Description

A disease of the joints, caused by an infection in another part of the body, auto-immune disease, or post-vaccination. This disease is characterised by a secondary inflammation of the joints in reaction to infection, auto-immune disease, or vaccination. Common previous sites of infection are the enteric or genitourinary system.

Coding note

Code also the underlying disease or aetiology.

Excludes

  • 4A62 – Behçet disease
  • 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

  • FA11.0 – Arthropathy following intestinal bypass
  • FA11.1 – Arthropathy following vaccination
  • FA11.2 – Arthropathy following genitourinary infection
  • FA11.Y – Other specified reactive arthropathies
  • FA11.Z – Reactive arthropathies, unspecified

Sibling codes

  • FA10 – Direct infections of joint
  • FA12 – Postinfectious arthropathies
  • FA13 – Infectious spondyloarthritis
  • FA1Y – Other specified infection related arthropathies
  • FA1Z – Infection related arthropathies, unspecified

Foundation entity

Reactive arthropathies – http://id.who.int/icd/entity/1370972705

Allowed postcoordination axes

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