Benjamin Sommers, MD, PhD, is associate professor of health policy and economics at the Harvard T.H. Chan School of Public Health, and associate professor of medicine at Harvard Medical School. He is a health economist and primary care physician whose main research interests are health policy for vulnerable populations and the health care safety net. He has received numerous awards for his research, including the Health Services Research Impact Award for his work on the Affordable Care Act and the Article-of-the-Year Award from AcademyHealth, as well as the Outstanding Junior Investigator Award from the Society of General Internal Medicine. In 2011-2012, he served as a senior adviser in the Office of the Assistant Secretary for Planning and Evaluation in the U.S. Department of Health and Human Services. His current research projects focus on barriers to health care access among low-income adults, Medicaid policy, and national health reform.