WASHINGTON — For years, Harvard’s experts on health economics and policy have advised presidents and Congress on how to provide health benefits to the nation at a reasonable cost. But those remedies will now be applied to the Harvard faculty, and the professors are in an uproar.

Members of the Faculty of Arts and Sciences, the heart of the 378-year-old university, voted overwhelmingly in November to oppose changes that would require them and thousands of other Harvard employees to pay more for health care. The university says the increases are in part a result of the Obama administration’s Affordable Care Act, which many Harvard professors championed.