1D46

ICD-11 MMS 2026-01

West Nile virus infection

Description

A condition caused by an infection with West Nile virus. This condition is commonly asymptomatic. This condition may present with fever, headache, stiffness of the neck, stupor, disorientation, coma, tremors, convulsions, muscle weakness, or paralysis. Transmission is through the bite of an infected mosquito. Confirmation is by detection of IgG or IgM anti-West Nile virus antibodies in a serum sample.

Index terms

  • West Nile virus infection
  • Kunjin virus disease
  • West Nile fever
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  • West Nile viral infection
  • disease due to West Nile virus
  • Encephalitis due to Kunjin virus
  • West Nile encephalitis
  • West Nile viral encephalitis

Inclusions

  • West Nile fever

Exclusions from above levels

  • NE83.1 – Infection arising from device, implant or graft, not elsewhere classified

Sibling codes

  • 1D40 – Chikungunya virus disease
  • 1D41 – Colorado tick fever
  • 1D42 – O'nyong-nyong fever
  • 1D43 – Oropouche virus disease
  • 1D44 – Rift Valley fever
  • 1D45 – Sandfly fever
  • 1D47 – Yellow fever
  • 1D48 – Zika virus disease
  • 1D49 – Crimean-Congo haemorrhagic fever
  • 1D4A – Omsk haemorrhagic fever
  • 1D4B – Kyasanur Forest disease
  • 1D4C – Alkhurma haemorrhagic fever
  • 1D4D – Ross River disease
  • 1D4E – Severe fever with thrombocytopenia syndrome
  • 1D4Y – Other specified arthropod-borne viral fevers
  • 1D4Z – Arthropod-borne viral fever, virus unspecified

Foundation entity

West Nile virus infection – http://id.who.int/icd/entity/1091013360

Allowed postcoordination axes

Part of: 01: Certain infectious or parasitic diseases