• chronic obstructive pulmonary disease with acute lower respiratory infection (J44.0)
  1. J21 Acute bronchiolitis


    • acute bronchiolitis with bronchospasm


    • respiratory bronchiolitis interstitial lung disease (J84.115)
    1. J21.0 Acute bronchiolitis due to respiratory syncytial virus

      Inclusion term(s):

      • Acute bronchiolitis due to RSV
    2. J21.1 Acute bronchiolitis due to human metapneumovirus

    3. J21.8 Acute bronchiolitis due to other specified organisms

    4. J21.9 Acute bronchiolitis, unspecified

      Inclusion term(s):

      • Bronchiolitis (acute)
Abbreviations used here:

NEC Not elsewhere classifiable
This abbreviation in the Tabular List represents “other specified”. When a specific code is not available for a condition, the Tabular List includes an NEC entry under a code to identify the code as the “other specified” code.

NOS Not otherwise specified
This abbreviation is the equivalent of unspecified.