Harlan Krumholz is a cardiologist, health care scientist, and health care improvement expert at Yale University where he is the Harold H. Hines, Jr. professor of medicine. He is director of the Yale-New Haven Hospital Center for Outcomes Research and Evaluation and co-director of the Robert Wood Johnson Foundation Clinical Scholars Program at Yale. He has led research and initiatives to improve the quality and outcomes of clinical decisions and health care delivery, reduce disparities, enable transparency in practice and research, and avoid wasteful practices. His team is guiding federal efforts to measure and promote health care value. He began the Yale Open Data Access Project to promote data sharing and open science. He founded Hugo, a mobile app to empower people with their health-related data, promoting the possibility of a consumer-mediated information platform. He is a founding member of the Board of Governors of the Patient-Centered Outcomes Research Institute. Harlan received a B.S. from Yale, an M.D. from Harvard Medical School, and a Master's degree in health policy and management from the Harvard University School of Public Health.