Damian Williams, the United States Attorney for the Southern District of New York, James Smith, the Assistant Director in Charge of the New York Field Office of the Federal Bureau of Investigation (“FBI”), and Naomi Gruchacz, the Special Agent in Charge of the New York Regional Office of the US Department of Health and Human Services, Office of Inspector General (“HHS-OIG”), announced the unsealing of Superseding Indictments charging Boris Aminov, Christy Corvalan, Irina Polvanova, Roman Shamalov, Jonathan Gavrielof, Antonio Payano, David Fernandez, Crystal Medina, Juan Hernandez, a/k/a “Pop,” and Albert Yagudayev, a/k/a “Jeff,” in connection with their participation in a years-long scheme to defraud Medicaid, Medicare, and private insurance companies out of at least approximately $20 million. Polvanova, Shamalov, and Yagudayev were arrested this morning and Gavrielof was arrested yesterday evening. All four will be presented before Chief US Magistrate Judge James L. Cott today. Aminov, Corvalan, Fernandez, and Medina were previously arrested in connection with an earlier indictment in the case, which is assigned to US District Judge Mary Kay Vyskocil. Payano and Hernandez remain at large.