Flu due to oth ident influenza virus w oth resp manifest

This code signifies influenza caused by a specific, identified influenza virus strain (other than avian or novel H1N1) that presents with respiratory symptoms beyond simple upper respiratory infection, such as bronchitis, bronchiolitis, or pneumonia. It indicates a confirmed influenza infection with a documented respiratory complication.

Apply this code when a patient has a laboratory-confirmed influenza infection (e.g., positive rapid flu test, PCR) and the medical record explicitly documents other respiratory manifestations like acute bronchitis, tracheitis, or pneumonitis. Documentation must clearly state the specific influenza virus type if known, and the associated respiratory condition.

• Do not use this code for influenza with unspecified respiratory manifestations; a more specific code would be required.
• Ensure the documentation specifies an "other identified" influenza virus, differentiating it from avian or novel H1N1 strains.
• Sequence this code as the primary diagnosis when the influenza and its respiratory manifestation are the reason for the encounter.