Whooping cough due to Bordetella parapertussis w/o pneumonia

This code identifies whooping cough (pertussis) specifically caused by the bacterium Bordetella parapertussis. It indicates that the patient is experiencing the characteristic symptoms of pertussis, such as severe coughing fits, but without any associated pneumonia.

Use this code when documentation clearly states a diagnosis of pertussis due to Bordetella parapertussis and explicitly rules out or does not mention pneumonia. This is appropriate for patients presenting with the catarrhal or paroxysmal stages of pertussis where lung involvement is absent.

• Differentiate from pertussis caused by Bordetella pertussis (A37.0-) or unspecified Bordetella species (A37.9-).
• Ensure documentation explicitly states "without pneumonia" or that pneumonia is not present. If pneumonia is present, a different code from the A37.1 series would be appropriate.
• Always review microbiology reports or physician notes confirming the specific Bordetella species.