ICD-10-CM > J00-J99 > J09-J18 > J11 > J11.8 J11.8 Influenza due to unidentified influenza virus with other manifestations Non-Billable/Non-Specific Codes J11.81Influenza due to unidentified influenza virus with encephalopathyJ11.82Influenza due to unidentified influenza virus with myocarditisJ11.83Influenza due to unidentified influenza virus with otitis mediaJ11.89Influenza due to unidentified influenza virus with other manifestations