• chronic obstructive pulmonary disease with acute lower respiratory infection (J44.0)
  1. J00 Acute nasopharyngitis [common cold]

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.