CA42

ICD-11 MMS 2026-01

Acute bronchitis

Description

An acute disease of the bronchi, commonly caused by an infection with a bacterial or viral source. This disease is characterised by inflammation of the bronchi. This disease presents with cough, wheezing, chest pain or discomfort, fever, or dyspnoea. Transmission is by inhalation of infected respiratory secretions. Confirmation is by identification of the infectious agent in a sputum sample.

Excludes

  • CA20.0 – Acute noninfectious bronchitis
  • CA20.1 – Chronic bronchitis, NOS
  • CA20.10 – Simple chronic bronchitis
  • 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

Exclusions from above levels

  • 01 – Certain infectious or parasitic diseases
  • 05 – Endocrine, nutritional or metabolic diseases
  • 18 – Complications of pregnancy, childbirth and the puerperium
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  • 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

Child 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
  • CA42.4 – Acute bronchitis due to Haemophilus influenzae
  • CA42.5 – Acute bronchitis due to Coxsackievirus
  • CA42.Y – Other specified acute bronchitis
  • CA42.Z – Acute bronchitis, unspecified

Sibling codes

  • CA40 – Pneumonia
  • CA41 – Acute bronchiolitis
  • CA43 – Abscess of lung or mediastinum
  • CA44 – Pyothorax
  • CA45 – Respiratory infections, not elsewhere classified
  • CA4Y – Other specified lung infections
  • CA4Z – Lung infections, unspecified

Foundation entity

Acute bronchitis – http://id.who.int/icd/entity/727572936

Allowed postcoordination axes

Part of: 12: Diseases of the respiratory system