J21 - Acute bronchiolitis
Includes:
-acute bronchiolitis with bronchospasm
Excludes 2:
-respiratory bronchiolitis interstitial lung disease J84.115)
J21.0 - Acute bronchiolitis due to respiratory syncytial virus
J21.1 - Acute bronchiolitis due to human metapneumovirus
J21.8 - Acute bronchiolitis due to other specified organisms
J21.9 - Acute bronchiolitis, unspecified