U.S. Department of Justice to  aggressively identify, investigate and prosecute fraud  in Medicaid, SNAP and other federally funded benefits administered by the state.

 Missouri is all-in in the Trump administration's unprecedented war on fraud,  Kehoe said while flanked by Missouri Attorney General Catherine Hanaway and two U.S. attorneys.

Hanaway said the endeavor is a continuation of existing antifraud efforts, with improved federal-state cooperation.

In the pre-dawn hours of Thursday morning, federal authorities descended on a massive gated house in the upscale residential neighborhood of Tarzana in Los Angeles. There, they arrested Hany Malek, 61, a chiropractor indicted on charges that he posed as a doctor in order to refer patients for medically unnecessary atherectomies - an invasive procedure in which a catheter is used to clear plaque from arteries.

Prosecutors say Malek referred the patients to his business partner and surgeon, Dr. Harold Tabaie, 78, of Anaheim, who sometimes falsely told patients that the initial surgery was unsuccessful in order to justify another. The duo allegedly made roughly $134 million through these unnecessary procedures, prosecutors said.

Both men are charged with four counts of healthcare fraud, and the chiropractor is charged with an additional two counts of bank fraud. No attorneys were listed for either Malek or Tabaie. Efforts to reach both men through phones listed on public records were unsuccessful on Thursday morning.

A network of dozens of fake substance abuse treatment centers raked more than $1.5 billion - the bulk of the roughly $2 billion - for addiction treatment that was never provided.

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Associated Press writer David A. Lieb contributed from Jefferson City, Missouri.