Federal agents arrested more than 30 suspects in a major Medicare anti-fraud operation in Boston, Houston, Louisiana and New York, the AP/Boston Globe reports. The $16 million operation involved more than 200 agents and included 12 search warrants at health care businesses and homes.

The operation is the third major sweep since May when HHS Secretary Kathleen Sebelius and Attorney General Eric Holder announced they were adding millions of dollars and dozens of agents to fight Medicare fraud, which costs the U.S. billions of dollars per year. The Medicare Fraud Strike Force has recovered $371 million in false claims and charged 145 people in targeted cities across the U.S. in the months since the announcement.