1C19.0

ICD-11 MMS 2026-01

Nonpneumonic Legionnaires' disease

Description

The non-pneumonic form (Pontiac fever) is an acute, self-limiting flu-like illness usually lasting 2–5 days. The incubation period is from a few and up to 48 hours. The main symptoms are fever, chills, headache, malaise and muscle pain (myalgia).

Index terms

  • Nonpneumonic Legionnaires' disease
  • extrapulmonary legionella infection
  • legionellosis nonpneumonic
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  • nonpneumonic Legionnaire's disorder
  • nonpneumonic legionella pneumophila infection
  • pontiac fever

Exclusions from above levels

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

Sibling codes

  • 1C19.1 – Legionnaires disease
  • 1C19.Z – Legionellosis, unspecified

Foundation entity

Nonpneumonic Legionnaires' disease – http://id.who.int/icd/entity/1670562980

Part of: 1C19: Legionellosis › 01: Certain infectious or parasitic diseases