TV’s ‘Dr. Oz’ is sworn in as head of the agency responsible for Medicare and Medicaid. As head of the Centers for Medicare and Medicaid Services, the 64-year-old former heart surgeon and TV talk-show host will manage health insurance programs for roughly half the country, with oversight of Medicare, Medicaid and Affordable Care Act coverage. Dr. Mehmet Oz steps into the role as Congress debates cuts to Medicaid, which aids millions of poor and disabled people. Trump looked on as Oz was sworn in Friday by Health Secretary Robert F. Kennedy Jr. during a ceremony in the Oval Office. The president repeated his promise of “no cuts” to Medicare and Medicaid and thanked Oz for the “big commitment” he’s making.