Once a proponent of Medicare Advantage plans, Oz vowed Friday to go after those plans if they unfairly raise costs for the government.

President Trump’s nominee to lead the Medicare agency criticized ‘upcoding,’ a business tactic of private insurers in the Medicare Advantage program that can boost federal payments.

As expected, Democratic lawmakers hammered Oz on the administration's aim to reduce spending for Medicaid, but Oz did leave open the door for a Medicare Advantage crackdown.