Jason Block is a general internal medicine physician, and associate professor in population health medicine at Harvard Medical School. He is also director of Division of Chronic Disease Research Across the Lifecourse (CoRAL). His primary research interests are neighborhood-level determinants of weight gain and obesity, the evaluation of governmental and institutional policies and other novel interventions to improve diet, and leveraging electronic health record data for observational research and public health surveillance. He has served as a Senior Advisor in the Assistant Secretary for Health’s Office at the U.S. Department of Health and Human Services. Block was previously a Robert Wood Johnson Foundation Health and Society Scholar at HCPDS.