Although South Florida's top federal prosecutor said healthcare fraud is "massive" in the region, the creation of a federal Medicare Fraud Strike Force has boosted the number of prosecutions. The Strike Force is led by South Florida and Justice Department prosecutors and FBI and Health and Human Services agents. In the 12 months that ended at the end of September, 245 South Florida defendants were charged with filing almost $793.5 million in false Medicare claims, U.S. Attorney R. Alexander Acosta said.