1C19

ICD-11 MMS 2026-01

Legionellosis

Description

Legionellosis varies in severity from a mild febrile illness to a serious and sometimes fatal form of pneumonia and is caused by exposure to Legionella species found in water, and potting mixes. Legionellosis is a generic term describing the pneumonic and non-pneumonic forms of infection with Legionella.

Exclusions from above levels

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

Child codes

  • 1C19.0 – Nonpneumonic Legionnaires' disease
  • 1C19.1 – Legionnaires disease
  • 1C19.Z – Legionellosis, unspecified

Sibling codes

  • 1C10 – Actinomycosis
  • 1C11 – Bartonellosis
  • 1C12 – Whooping cough
  • 1C13 – Tetanus
  • 1C14 – Obstetrical tetanus
  • 1C15 – Tetanus neonatorum
  • 1C16 – Gas gangrene
  • 1C17 – Diphtheria
  • 1C18 – Brazilian purpuric fever
  • 1C1A – Listeriosis
  • 1C1B – Nocardiosis
  • 1C1C – Meningococcal disease
  • 1C1D – Yaws
  • 1C1E – Pinta
  • 1C1F – Endemic non-venereal syphilis
  • 1C1G – Lyme borreliosis
  • 1C1H – Necrotising ulcerative gingivitis
  • 1C1J – Relapsing fever
  • 1C40 – Campylobacteriosis
  • 1C41 – Bacterial infection of unspecified site
  • 1C42 – Melioidosis
  • 1C43 – Actinomycetoma
  • 1C44 – Non-pyogenic bacterial infections of the skin
  • 1C45 – Toxic shock syndrome
  • 1C4Y – Other specified bacterial diseases
  • 1C4Z – Unspecified bacterial disease

Foundation entity

Legionellosis – http://id.who.int/icd/entity/390042715

Part of: 01: Certain infectious or parasitic diseases