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Payer

The vast majority of Medicare Advantage markets are highly concentrated, according to the American Medical Association's annual Competition in Health Insurance report.

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Prospective CMS Administrator Mehmet Oz, MD, has been a major proponent of Medicare Advantage, and has pitched expanding the program to extend coverage to all Americans. 

From the Justice Department suing to stop its acquisition of a home health company to naming a new chief information security officer, here are 12 updates on UnitedHealth Group and its subsidiaries that Becker's has reported since Nov. 1: 

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