Lisa I. Iezzoni, MD, MSc, is a professor of Medicine at Harvard Medical School based at the Health Policy Research Center at the Mongan Institute at Massachusetts General Hospital in Boston. She has published and spoken widely on risk adjustment and edited Risk Adjustment for Measuring Health Care Outcomes. She also studies health care quality, delivery systems, and policy issues relating to persons with disabilities. She wrote When Walking Fails and was co-author of More Than Ramps: A Guide to Improving Health Care Quality and Access for People with Disabilities. Dr. Iezzoni is a member of the Institute of Medicine of the National Academy of Sciences.