Influenza due to unidentified influenza virus (J11)

The ICD-10 code J11 covers influenza caused by an unidentified influenza virus, including various specific complications such as pneumonia, respiratory, gastrointestinal, and other systemic manifestations.

This section is used to code cases of influenza when the virus type is not specifically identified, but the infection causes notable health issues. For example, J11.0 represents influenza with pneumonia, while subcodes like J11.00 and J11.08 distinguish between unspecified pneumonia and specified types such as bronchopneumonia caused by influenza virus. Other subcodes address additional complications: J11.1 includes upper respiratory tract infections like laryngitis and pharyngitis; J11.2 covers gastrointestinal symptoms linked to influenza; and J11.81 and J11.82 represent serious conditions such as encephalopathy and myocarditis respectively. For those coding or searching for an "ICD-10 code for pneumonia caused by influenza virus," or "ICD-10 code for influenza with otitis media," these specific J11 subcategories help ensure accurate capture of the clinical picture. This detailed classification assists healthcare professionals in identifying influenza cases that present with various non-specific or secondary manifestations when the exact viral strain is not confirmed.