Julie Bynum, M.D., M.P.H., Professor of Internal Medicine, Division of Geriatric & Palliative Medicine, earned her B.S. from Union College, an M.P.H. from The Johns Hopkins School of Hygiene & Public Health, and an M.D. from Johns Hopkins University School of Medicine. One of Bynum’s contributions to the field has been to develop a method of creating “virtual” physician-hospital networks that allows the measurement of care delivered and its outcomes for a population served by a specific group of providers. These networks were used in the conceptual development of the Accountable Care Organization (ACO) legislation. Dr. Bynum joins us from The Dartmouth Institute for Health Policy & Clinical Practice (TDI), Geisel Medical School at Dartmouth, Lebanon, New Hampshire.