CA42.4

ICD-11 MMS 2026-01

Acute bronchitis due to Haemophilus influenzae

Description

A disease of the bronchi, caused by an infection with the gram-negative bacteria Haemophilus influenzae. This disease is characterised by acute inflammation of the bronchi leading to cough, sputum production, wheezing or shortness of breath. Transmission is by inhalation of infected respiratory secretions, or direct contact. Confirmation is by identification of Haemophilus influenzae in blood or other typically sterile body fluid.

Index terms

  • Acute bronchitis due to Haemophilus influenzae
  • acute bronchitis due to H. influenzae

Exclusions from above levels

  • CA20.0 – Acute noninfectious bronchitis
  • CA20.1 – Chronic bronchitis, NOS
  • CA20.10 – Simple chronic bronchitis
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  • CA20.11 – Mucopurulent chronic bronchitis
  • CA22 – tracheobronchitis: chronic obstructive
  • CA22.1 – bronchitis, chronic: obstructive
  • CA27 – Tracheobronchitis, NOS
  • CA81.0 – Acute bronchitis due to chemical fumes
  • 01 – Certain infectious or parasitic diseases
  • 05 – Endocrine, nutritional or metabolic diseases
  • 18 – Complications of pregnancy, childbirth and the puerperium
  • 19 – Certain conditions originating in the perinatal period
  • 20 – Congenital malformations, deformations and chromosomal abnormalities
  • 22 – Injury, poisoning or certain other consequences of external causes

Sibling codes

  • CA42.0 – Acute bronchitis due to Streptococcus
  • CA42.1 – Acute bronchitis due to Rhinovirus
  • CA42.2 – Acute bronchitis due to Respiratory syncytial virus
  • CA42.3 – Acute bronchitis due to Parainfluenza virus
  • CA42.5 – Acute bronchitis due to Coxsackievirus
  • CA42.Y – Other specified acute bronchitis
  • CA42.Z – Acute bronchitis, unspecified

Foundation entity

Acute bronchitis due to Haemophilus influenzae – http://id.who.int/icd/entity/971074877

Allowed postcoordination axes

Part of: CA42: Acute bronchitis › 12: Diseases of the respiratory system