A controversial shift in healthcare is occurring as new guidelines encourage doctors to factor in cost, not just effectiveness, when selecting treatments for their patients, reports The New York Times.

Some doctors see a potential conflict in trying to be both providers of patient care and financial overseers.

“There should be forces in society who should be concerned about the budget, about how many M.R.I.s we do, but they shouldn’t be functioning simultaneously as doctors,” said Dr. Martin A. Samuels, the chairman of the neurology department at Brigham and Women’s Hospital in Boston. He said doctors risked losing the trust of patients if they told patients, “I’m not going to do what I think is best for you because I think it’s bad for the health care budget in Massachusetts.”