Get this, undiagnosed cases in the United States is costing our country eighteen billion dollars a year. The study points out that diabetes cost the U.S. more than 170 Billion dollars in medical expenses and lost productivity in 2007. However, that doesn't include the costs for the estimated 6.3 million adults in the United States who don't know they have diabetes. That could raise the total cost for diabetes in america to just over 190 billion dollars a year.