Influenza – Definitions & ICD 11 Codes

Definition of Influenza: Any disease of the respiratory system, caused by an infection with influenza virus. These diseases are characterised by fever, cough, headache, myalgia, arthralgia, or malaise. Transmission is by inhalation of infected respiratory secretions. Confirmation is by identification of influenza virus from a nasopharyngeal, nose, or throat swab.

Influenza due to identified seasonal influenza virus

ICD 11 Code For Influenza due to identified seasonal influenza virus

  1E30  Influenza due to identified seasonal influenza virus

Exclusions:

  • Haemophilus influenzae [H. influenzae] meningitis (1D01.00)
  • Haemophilus influenzae [H. influenzae] pneumonia (CA40.02)

Influenza due to identified zoonotic or pandemic influenza virus

Definition of Influenza due to identified zoonotic or pandemic influenza virus: Influenza, caused by influenza virus strains of special epidemiological importance with an animal-human or inter-human transmission. 

ICD 11 Code For Influenza due to identified zoonotic or pandemic influenza virus

  1E31  Influenza due to identified zoonotic or pandemic influenza virus

For use of this category, reference must be made to the guidelines of the Global Influenza Programme (GIP, www.who.int/influenza/) of WHO.

Coding Note:

  • Influenza caused by influenza virus strains of special epidemiological importance with an animal-human or inter-human transmission limited to the inclusions

Exclusions:

  • Haemophilus influenzae [H. influenzae] meningitis (1D01.00)
  • Haemophilus influenzae [H. influenzae] pneumonia (CA40.02)

Influenza virus not identified

Definition of Influenza, virus not identified: Any disease of the respiratory system, caused by an unidentified strain of influenza virus. These diseases are characterised by fever, cough, headache, myalgia, arthralgia, or malaise. Transmission is by inhalation of infected respiratory secretions.

ICD 11 Code For Influenza virus not identified

  1E32  Influenza virus not identified

Inclusions:

  • Influenza specific virus not stated to have been identified
  • Viral influenza specific virus not stated to have been identified

Exclusions:

  • Haemophilus influenzae [H. influenzae] meningitis (1D01.00)
  • Haemophilus influenzae [H. influenzae] pneumonia (CA40.02)

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