Oz has made his preference known for privatized Medicare, which could substantially disrupt the current system.

Mehmet Oz, a celebrity heart surgeon turned talk show host and lifestyle guru, is President-elect Donald Trump’s pick to run the Centers for Medicare and Medicaid Services, the massive federal health care bureaucracy that covers more than a third of Americans.

The well-known TV physician and former GOP Senate candidate was panned by Democrats as unqualified. The role requires Senate confirmation.