Even though Dr. Donald Berwick took the reins of Medicare and Medicaid without a confirmation hearing, one senator hasn't stopped asking questions. Courtesy of Donald Berwick hide caption

itoggle caption Courtesy of Donald Berwick

House Speaker Nancy Pelosi (D-CA) signs the Education, Jobs and Medicaid Assistance Act at the U.S. Capitol,  August 10, 2010. Alex Wong/Getty Images North America hide caption

itoggle caption Alex Wong/Getty Images North America

Medicare pay for doctors may be fixed for now, but don't bank on it staying that way forever. iStockphoto.com hide caption

itoggle caption iStockphoto.com