A lawsuit against UnitedHealth Group alleges that the insurer overcharged Medicare hundreds of millions of dollars. According to Reuters, the lawsuit, which was filed in 2011 but was just unsealed on February 16, claims the insurer depicted Medicare members as being sicker than they were. The Department of Justice has joined the lawsuit against UnitedHealth, as well as one against WellMed Medical Management, which UnitedHealth bought in 2011.

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