The problem with health care is people like me—doctors (mostly men) in our fifties and beyond, who learned medicine when it was more art and less finance. We were taught to go to the hospital before dawn, stay until our patients were stable, focus on the needs of each patient before us, and not worry about costs. We were taught to review every test result with our own eyes—to depend on no one. The only way to ensure quality was to adopt high personal standards for ourselves and then meet them. Now, at many health care institutions and practices, we are in charge. And that’s a problem, because health care today needs a fundamentally different approach—and a new breed of leaders.

A version of this article appeared in the April 2010 issue of Harvard Business Review.