The Federal Government charged 15 defendants, including six medical professionals, on Thursday in a massive crackdown on California healthcare fraud schemes that allegedly stole $1.8 billion in false medical claims.

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“If you steal from the American taxpayer, if you exploit vulnerable Americans, if you treat health care patients as dollar bills, the Department of Justice (DOJ) is coming for you, and one morning soon, the FBI and the U.S. Marshals Service will be at your door executing your arrest warrant,” said Assistant Attorney General Colin McDonald.

The alleged fraud included a scheme that lured vulnerable people to California for fake substance abuse treatment in a scheme worth over $1.6 billion, the largest such scheme ever prosecuted by the DOJ.

Nathan Young, 39, David Young, 71, both of Los Angeles, Honey Phipps, 42, and Cody Phipps, 36, both of Greenville, Texas, were charged in connection with the substance abuse treatment fraud.

Nicholas Moore, 33, of North Myrtle Beach, already pleaded guilty in connection with the scheme.

Prosecutors allegedly identified another $134 million billed to Medicare for medically unnecessary atherectomy procedures–procedures normally used to prevent arteries from narrowing–that left patients injured. Dr. Harold Tabaie, 78, of Anaheim, and Hany Malek, 61, of Tarzana, allegedly carried out the scheme.

Federal investigators also identified $138 million in allegedly fraudulent hospice Medicare billing in three separate hospice fraud schemes, reportedly run by Geoffrey Jimenez, 60, of Los Angeles, Dr. Richard Keech, 83, of Torrance, and Armani Raffi, 59, of Van Nuys, that were billing for patients who were not terminally ill.

Hassan Badday, 48, of Los Angeles, Robby Ayoub, 52, of Huntington Beach, and Thomas Steven Mladinich, 38, of Newport Beach, were all charged for allegedly illegally receiving kickbacks for patient referrals.

Another defendant, Christina Mareik, 61, of Whittier, was indicted following a $270 million scheme to defraud California’s Medicaid program by submitting pharmacy claims for fraudulent prescriptions.

Dejun Wang, 62, of Walnut, was charged for allegedly illegally selling samples of prescription drugs to pharmacy owners, who then repackaged them and sold them to customers.

Eight of the defendants were arrested on Thursday.

The crackdown comes as Mainers continue to wait for a similar crackdown to materialize in their state, months after Vice President J.D. Vance came to Bangor to acknowledge the massive amounts of healthcare fraud exposed by The Maine Wire.