“The Justice Department has joined a California whistleblower’s lawsuit that accuses insurance giant UnitedHealth Group of fraud in its popular Medicare Advantage health plans …. The whistleblower has accused the insurer of ‘gaming’ the Medicare Advantage payment system by ‘making patients look sicker than they are’ said his attorney … The attorney said the combined cases could prove to be among the ‘larger frauds’ ever against Medicare, with damages that he speculates could top $1 billion.” [Kaiser Health News]