The plan to investigate the private health-insurance companies that run Medicare Advantage has been drastically expanded.

Shares of big health insurer were in the red Thursday after the Centers for Medicare and Medicaid Services (CMS) said it ...

UnitedHealth Group’s stock plunged Thursday morning after a report that the embattled insurance giant was being probed for Medicare fraud. The Department of Justice has been conducting the ...

audits and reviews," without disclosing further details. In February, the Journal reported a civil fraud investigation into UnitedHealth's Medicare practices. The company had then said that it was ...