Pneumonia due to adenovirus

This code identifies an acute inflammatory condition of the lung parenchyma specifically caused by an adenovirus infection. It presents with symptoms typical of pneumonia, such as cough, fever, and dyspnea, but is etiologically linked to adenoviral pathogens.

Assign this code when documentation explicitly states pneumonia due to adenovirus. This diagnosis is typically supported by laboratory confirmation of adenovirus in respiratory secretions (e.g., PCR, viral culture) in a patient presenting with clinical and radiological evidence of pneumonia.

• Ensure the documentation clearly specifies adenovirus as the causative agent; "viral pneumonia" alone is insufficient.
• Distinguish from other viral pneumonias; if the specific virus is unknown, a more general viral pneumonia code should be used.
• Consider sequencing this code as the primary diagnosis if it is the reason for the encounter, followed by any associated complications.