Sengwee Darren Toh

Darren Toh, ScD is an Associate Professor in the Department of Population Medicine at Harvard Medical School and Harvard Pilgrim Health Care Institute. He is a pharmacoepidemiologist with an interest in the comparative safety and effectiveness research of medical products. His research focuses on 1) assessing the risks and benefits of medical products using electronic data collected as part of routine healthcare delivery, and 2) developing and applying privacy-protecting analytic methods to conduct multi-center studies in distributed data networks.

Darren is Chief Scientist at the Operations Center of the FDA-funded Sentinel System, a congressionally mandated national medical product safety surveillance system. He is Principal Investigator of projects funded by the National Institutes of Health (U01EB023683), the Agency for Healthcare Research and Quality (R01HS026214), the Patient-Centered Outcomes Research Institute (ME-1403-11305), and the Food and Drug Administration. Darren received his doctoral degree in Epidemiology from the Harvard School of Public Health.


For more information on distributed analytic and data-sharing methods research:




Associate Professor, Department of Epidemiology, Harvard T.H. Chan School of Public Health


Staff Assistant

Madison Cebular

Phone: 617-867-4211


Associate Professor

Work Phone
Mailing Address

Harvard Medical School
Department of Population Medicine
401 Park Drive, Suite 401
Boston, MA 02215