How do you code the immunization administration for a Medicare patient when they receive both a pneumonia (or flu) shot in addition to another vaccine such as a tetanus shot? We first tried billing G0009 and 90471 but got a denial. I then read to try G0009 and 90471 mod. 59 but Medicare only paid for the 90471 and denied the G0009. Will they only pay for one admin.? Thanks.