Tiffany Powell-Wiley, M.D., M.P.H.

During the decades in which obesity and cardiometabolic disorders have become pervasive public health crises in the United States, the human gene pool has remained virtually unchanged. Thus, while heredity influences individual susceptibility, the contributions of social, behavioral, psychosocial, and physical environments must be addressed to design truly effective prevention and treatment strategies. As an advocate and physician-scientist, Dr. Powell-Wiley focuses her research on the social determinants of obesity and cardiovascular risk factors that drive persistent racial, ethnic, and socioeconomic disparities in cardiovascular health.

The Social Determinants of Obesity and Cardiovascular Risk Laboratory pursues three interrelated research aims. First, Dr. Powell-Wiley and her team leverage community engagement, epidemiologic methods, and well-phenotyped, multi-ethnic population cohorts to characterize how neighborhood socioeconomic status, the built environment, and subjective perceptions of community safety or social cohesion promote adverse weight gain and cardiometabolic disease. Second, the laboratory elucidates the biological pathways—the "biology of adversity"—by which chronic environmental and psychosocial stress "get under the skin." This translational work evaluates stress neurobiology, systemic inflammation, immunometabolic alterations, and cardiovascular phenotypes that are most responsive to behavioral modification. Third, the group translates observational and mechanistic insights into targeted, community-engaged digital health interventions, mobile applications, and lifestyle programs tailored to overcome barriers in resource-limited settings.

Grounding her work in the principles of community-based participatory research (CBPR), Dr. Powell-Wiley has spearheaded cardiovascular health interventions across the greater Washington, D.C., area, with an intentional focus on areas where cardiometabolic disparities are most acute. Through sustained partnerships with local civic and faith-based community leaders, the lab developed and executed the Washington, D.C. Cardiovascular Health and Needs Assessment. Data from this initiative directly inform the co-design of culturally tailored, technology-enabled interventions—such as digital physical activity trials or dietary behavior interventions—that meet individuals within their lived environments.

To bridge the gap between academic clinical research and the public, Dr. Powell-Wiley and her team established the NHLBI Hope Center in Washington, D.C.’s Ward 5. Created in partnership with a local housing community, this community-embedded research hub facilitates clinical trial visits, health education, and outreach directly in participants’ neighborhoods. The Hope Center also fosters interdisciplinary collaboration across NIH institutes, including the National Human Genome Research Institute and the NIH Clinical Center.

Traditional, one-size-fits-all public health strategies have proved insufficient to curb the obesity epidemic or close health disparity gaps. By bridging epidemiology, cellular and biomarker mechanisms, and community-engaged behavioral medicine, Dr. Powell-Wiley’s laboratory strives to develop precision lifestyle interventions and evidence-based public health models that advance cardiovascular health.

Tiffany M. Powell-Wiley, M.D., M.P.H., FAHA, FABMR, graduated summa cum laude from the University of Michigan in Ann Arbor. During medical school, she spent a year at the National Institutes of Health (NIH) as a research fellow in the Clinical Research Training Program. She earned her Medical Degree from Duke University School of Medicine and completed a Master of Public Health with a concentration in Epidemiology at the University of North Carolina at Chapel Hill. Dr. Powell-Wiley completed her internal medicine residency at Brigham and Women’s Hospital in Boston, Massachusetts, followed by a cardiology fellowship at the University of Texas Southwestern Medical Center (UTSW) in Dallas, Texas. At UTSW, she completed two years as a clinical research fellow in the Reynolds Cardiovascular Research Center and served as the Cardiology division’s first chief fellow.

Dr. Powell-Wiley joined the NIH in 2011 as an Assistant Clinical Investigator at the National Heart, Lung, and Blood Institute (NHLBI) and held a joint appointment in the Applied Research Program of the National Cancer Institute (2011–2014). In 2017, she was named an Earl Stadtman Tenure-Track Investigator. Today, Dr. Powell-Wiley is a Senior Investigator with tenure, Chief of the Social Determinants of Obesity and Cardiovascular Risk Laboratory within NHLBI’s Cardiovascular Branch, and an Adjunct Senior Investigator with the National Institute on Minority Health and Health Disparities (NIMHD). She also serves as the Acting Deputy Branch Chief of the Cardiovascular Branch of the NHLBI DIR, and she is an attending cardiologist at the NIH Clinical Center.

Internationally recognized for her leadership in cardiovascular health equity and community-engaged research, Dr. Powell-Wiley was awarded the American Heart Association’s Population Research Prize (2021), was elected to the American Society for Clinical Investigation (ASCI, 2023), and received the Presidential Medal of Distinction from The Obesity Society (2024). In 2026, Dr. Powell-Wiley received the American Heart Association’s Louis B. Russell Jr Memorial Award in recognition of outstanding service in meeting the health needs of communities. At NIH, she has mentored more than 50 trainees and research fellows, many of whom have advanced to independent academic and faculty careers.