Dr. Bernard Jaar is an assistant professor of medicine at the Johns Hopkins University School of Medicine. He holds a joint appointment in epidemiology at the Johns Hopkins Bloomberg School of Public Health. His areas of clinical expertise include nephrology and chronic renal failure. 

Dr. Jaar earned his M.D. from Faculte de Medecine et de Pharmacie. He completed a nephrology residency at Tenon Hospital and an internal medicine residency at Graduate Hospital. He performed a fellowship at UFR de Medecine Saint-Antoine, a fellowship in epidemiology at the Johns Hopkins Bloomberg School of Public of Health, and a fellowship in nephrology at Johns Hopkins. 

His research interests include epidemiology of chronic kidney disease, survival in dialysis patients, peripheral vascular disease and lead nephropathy.

Dr. Jaar was recognized by the National Kidney Foundation of Maryland with a Volunteer of the Year Award in 2013. He is a member of several professional organizations, including the International Society of Nephrology, American Society of Nephrology and the American Medical Association.