Flu due to oth ident flu virus w same oth ident flu virus pn

This code signifies a patient diagnosed with influenza caused by a specific, identified influenza virus, where the infection has progressed to include pneumonia also attributed to that same identified influenza virus. It represents a confirmed case of influenza with a lower respiratory tract complication.

Apply this code when medical record documentation clearly states a diagnosis of influenza due to a specific, identified influenza virus (e.g., H1N1, H3N2) and also confirms pneumonia caused by that same identified influenza virus. This typically requires laboratory confirmation of the viral strain.

• Ensure documentation specifies both the influenza virus and the pneumonia are due to the same identified virus.
• Do not use if the influenza virus is not identified or if the pneumonia is bacterial or of an unspecified cause.
• This code inherently includes the pneumonia; no additional pneumonia code is needed for the viral pneumonia component.