JOHN A. GREAGER II owned and operated Cancer Therapy Associates S.C., in Lombard, Ill. From 2015 to 2021, Greager fraudulently obtained approximately $4.1 million from Medicare and Blue Cross Blue Shield of Illinois by submitting fraudulent claims that falsely represented that certain health care services, including mole removal procedures, had been provided to patients, according to a criminal information filed in U.S. District Court in Chicago.