System
WHO ICD-10
J21
ICD-10 code
J21
Category
Acute bronchiolitis
Chapter
Chapter X · Diseases of the respiratory system
About this code
J21 is the ICD-10 category for Acute bronchiolitis, within chapter X · Diseases of the respiratory system. ICD-10 is the World Health Organization's classification of diseases and is used on medical records, insurance claims and health statistics worldwide. A code is a classification, not a diagnosis: this page is a reference index, not medical advice, and any health question belongs with a doctor.