Denis Nash

ISPH Executive Director
Distinguished Professor of Epidemiology

[email protected]


PhD, Epidemiology and Preventive Medicine
University of Maryland

MPH, Epidemiology and Public Health
Johns Hopkins University

BS, Physics
Drexel University

Dr. Nash is an epidemiologist with over 20 years of experience and leadership in conducting epidemiologic studies. His central interests include infectious diseases, the field of public health surveillance, the use of public health surveillance data to conduct rigorous assessments of programmatic effectiveness, and the impact of policies on health. He has worked extensively in domestic and international settings conducting large-scale, ‘real-world’ epidemiologic studies examining key outcomes among persons with HIV infection.

Dr. Nash is Distinguished Professor of Epidemiology at the CUNY School of Public Health. He has worked at the forefront of the emerging field of implementation science, and is the founding Executive Director of CUNY’s interdisciplinary Institute for Implementation Science in Population Health. He has published over 250 scientific articles and his research is primarily funded by the National Institutes of Health and the Centers for Disease Control and Prevention. He is the Associate Director of the Einstein-Rockefeller-CUNY Center for AIDS Research (CFAR) and Director the Implementation Science and Health Outcomes Core of the HIV Center for Clinical and Behavioral Studies at Columbia University. Dr. Nash also serves as a standing member on the National Institutes of Health study section review panels.

Prior to joining CUNY, Dr. Nash was an Associate Professor of Epidemiology at Columbia University’s Mailman School of Public Health. He also served as the founding Director of Monitoring, Evaluation and Research for ICAP at Columbia University, where he spearheaded a large-scale, multi-country initiative collecting routine medical records electronically. Prior to joining academia, Dr. Nash was the Director of HIV/AIDS Surveillance at the New York City Department of Health and Mental Hygiene, where he played a key role in implementing named reporting for HIV.  Dr. Nash also served two years of active duty as an Epidemic Intelligence Service (EIS) Officer with the Centers for Disease Control and Prevention, and played a key role in the outbreak investigation of the detection and emergence of West Nile Virus in New York in 1999.

Early in the COVID-19 pandemic, Dr. Nash and his research team launched a large-scale COVID-related research portfolio aimed at understanding and elucidating SARS-CoV-2 risk factors and trends in SARS-CoV-2 incidence. Key projects include a national community-based cohort study of adults (the CHASING COVID Cohort Study) and a city-wide collaboration with the urgent care provider, CityMD.

Dr. Nash holds secondary faculty appointments in the Department of Epidemiology at Columbia University’s Mailman School of Public Health and in the Department of Epidemiology and Population Health at the Albert Einstein College of Medicine.

Dr. Nash teaches courses in Infectious Disease Epidemiology and Public Health Surveillance to graduate students in public health, and has mentored over 100 masters students, doctoral students, and post-doctoral fellows training in epidemiology, public health and implementation science.

Dr. Nash is quoted regularly by the New York Times, the Guardian, the Associated Press,, Rolling Stone, the Washington Post, US News and World Report, ProPublica, Gothamist, Axios, the Daily News, the New York Post, WebMD, Crains New York, and, and has appeared on NPR, WNYC, the Brian Lehrer Show, Canadian Public Radio, Irish Public Radio (RTE), Tokyo Broadcasting Network, Al Jazeera, New York 1, Pix11, and 1010 WINS. A full list of media appearances and links can be found here.