Since Flu season is rapidly approaching, we decided to take a look at the medical codes that are utilized for billing of vaccine shots.   First of all, what exactly is the Flu? Flu is short for Influenza, which is a contagious respiratory disease caused by the Influenza virus. Influenza virus infects the nose, throat, and in a rare condition the lungs. The symptoms can be mild to severe. The most common influenza symptoms include high fever, sore throat, headache, coughing, runny nose, muscle and joint pain, and fatigue (body weakness). This virus generally occurs during the winter months. Influenza is a serious health condition that can lead to pneumonia. …