Timothy G. Ferris, M.D., M.P.H., is a practicing general internist and pediatrician, medical director of the Massachusetts General Physicians Organization, and vice president of Population Health Management at Partners HealthCare, a network of hospitals and physicians in Boston. He is also a senior scientist in the Mongan Institute for Health Policy and an associate professor of Medicine and Pediatrics at Harvard Medical School. Dr. Ferris has over 90 publications in the areas of health care quality measurement, risk adjustment, population management, and information technology. He has led efforts at Partners HealthCare to improve the care of patients with multiple chronic conditions. He is the principal investigator for an ongoing six-year Medicare demonstration project examining how best to redesign care to improve quality and decrease costs for Medicare beneficiaries. Dr. Ferris holds degrees from Middlebury College, Oxford University, Harvard School of Public Health, and Harvard Medical School.