Excludes1

  • bronchitis due to chemicals, gases, fumes and vapors (J68.0)

Excludes2

  • cystic fibrosis (E84.-)
  1. J42 Unspecified chronic bronchitis

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.