Flu due to unidentified flu virus w specified pneumonia

This code signifies a patient diagnosed with influenza, where the specific type of influenza virus has not been identified, and the patient also presents with a documented pneumonia. It indicates a respiratory infection with a known complication of pneumonia, but the viral strain remains unspecified.

Use this code when the medical record clearly states a diagnosis of influenza and pneumonia, but laboratory testing for the influenza virus subtype (e.g., H1N1, H3N2) is either pending, inconclusive, or not performed. Documentation must explicitly link the pneumonia to the influenza infection.

• Ensure documentation specifies "with pneumonia" and that the influenza virus is "unidentified" or "unspecified."
• Do not use if the influenza virus type is identified (e.g., Influenza A, Influenza B); instead, use a more specific code from the J09-J11 range.
• This code requires a secondary code to identify the specific type of pneumonia, if known (e.g., bacterial pneumonia, viral pneumonia).