Influenza due to oth ident influenza virus w GI manifest

This code signifies an influenza infection caused by a specific, identified influenza virus strain, where the primary clinical presentation includes symptoms affecting the gastrointestinal system. This goes beyond typical respiratory flu symptoms to involve nausea, vomiting, diarrhea, or abdominal pain directly attributable to the influenza virus.

Apply this code when documentation clearly states an influenza diagnosis, specifies the influenza virus (e.g., H1N1, H3N2, or other identified strain), and details gastrointestinal symptoms as a significant manifestation. This is appropriate when the GI symptoms are part of the systemic influenza illness, not a separate, co-occurring condition.

• Ensure the medical record explicitly identifies the influenza virus type, not just "influenza."
• Do not use this code for viral gastroenteritis (often colloquially called "stomach flu" or "intestinal flu"), as indicated by the Excludes1 note.
• Verify that the gastrointestinal symptoms are documented as manifestations of the influenza, rather than an independent GI infection.