Influenza due to unidentified influenza virus
Notes: Influenza with pneumonia NOS ; Influenza NOS ; Influenzal laryngitis NOS ; Influenzal pharyngitis NOS ; Influenza with upper respiratory symptoms NOS ; Influenza gastroenteritis NOS ; Influenzal encephalopathy NOS ; Influenzal myocarditis NOS ; Influenzal otitis media NOS ; code for associated pleural effusion, if applicable (J91.8) ; code for associated sinusitis, if applicable (J01.-) ; code for any associated perforated tympanic membrane (H72.-) ; codes to identify the manifestations ; ‘intestinal flu’ [viral gastroenteritis] (A08.-)