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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.

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. 

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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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