Ambulance Medical Billing is generating additional revenue since taking over the billing service for Warren County EMS.From July 1, 2016 to July 31, 2017, AMB collected $2.01 million. AMB was paid $116,060 for its services, leaving the county with approximately $1.9 million.During that same timeframe the year prior, the department collected $1.86 million on its own. That means, after expenses, AMB collected $39,369 in additional money for the county while earning roughly three times that for itself.The information was presented during a county Safety Committee meeting.