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Bernard Jaar, M.D., M.P.H.

Bernard Jaar, M.D.

Assistant Professor of Medicine

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.


English, French, Creole

Centers and Institutes

Welch Center for Prevention, Epidemiology, and Clinical Research


Chronic Kidney Disease, End-Stage Kidney Disease, Hemodialysis, Peritoneal Dialysis

Awards and Recognitions

  • Valedictorian, School of Medicine and Pharmacy, State University of Haiti (1987)
  • Valedictorian, Necker School of Medicine, University of Paris V (1992)
  • The Boehringer Mannheim Prize (1992)
  • The Victoria Prize 1999
  • Ruth L. Kirschstein National Research Service Award to train in Renal Disease Epidemiology, National Institute of Diabetes, Digestive and Kidney Diseases (2001 – 2003)
  • Richard Ross Clinician Scientist Award, Johns Hopkins University - School of Medicine (2003-2004)
  • Junior Faculty Clinical Research Award. Department of Medicine Johns Hopkins University School of Medicine for the project entitle: Dialysis Modality and Mortality in a National Cohort: The CHOICE Study (2004)
  • Fellow, American Society of Nephrology (2005)
  • Physician's Recognition Award certificate with commendation (AMA PRA), AMA
  • (2003-2009)
  • Associate Faculty Member, Welch Center for Prevention, Epidemiology and Clinical Research Johns Hopkins Medical Institutions (2008)
  • John Rogers Excellence in Teaching Award (2009)
  • Volunteer of the Year Award, National Kidney Foundation of Maryland (2013)

Professional Memberships

  • American College of Physicians, a national organization of internists
  • American Medical Association, the largest association of physicians and medical students in the United States
  • American Society of Nephrology, an organization that aims to prevent, treat and cure kidney diseases
  • International Society of Nephrology, an international organization representing specialists in nephrology
  • National Kidney Foundation, an organization dedicated to the awareness, prevention and treatment of kidney disease


Chair - National Kidney Foundation of Maryland’s Medical Advisory Board (2011)

Clinical Trials

Providing Resources to Enhance Patients' Readiness to Make Decisions About Kidney Disease: The PREPARE NOW Study (PREPARE NOW)

Research Interests

Outcomes in Chronic Kidney Disease and Dialysis, Cardiovascular Disease, Peripheral Arterial Disease 

Research Summary

Research in the Bernard Jaar Lab focuses on health related outcomes in chronic kidney disease and end-stage kidney disease. We are interested in comparison of survival and quality of life outcomes between dialysis modalities, better understanding of causes and patients characteristics and outcomes associated with hospital readmissions in chronic kidney disease. Our research also focuses on outcomes associated with cardiovascular disease and specifically peripheral arterial disease in this high risk population. 


  1. Abougergi M, Broor A, Cui W, Jaar BG. “Intravenous immunoglobulin for the treatment of severe Clostridium difficile colitis: an observational study and review of the literature.” J Hosp Med. 2010 Jan;5(1):E1-9. doi: 10.1002/jhm.542.
  2. Plantinga LC, Fink NE, Coresh J, Sozio SM, Parekh RS, Melamed ML, Powe NR, Jaar BG. “Peripheral vascular disease-related procedures in dialysis patients: predictors and prognosis.” Clin J Am Soc Nephrol. 2009 Oct;4(10):1637-1645.
  3. Navas-Acien A, Tellez-Plaza M, Guallar E, Muntner P, Silbergeld E, Jaar B, Weaver V. “Blood cadmium and lead and chronic kidney disease in us adults: a joint analysis.” Am J Epidemiol. 2009 Nov 1;170(9):1156-64. doi: 10.1093/aje/kwp248. Epub 2009 Aug 21.
  4. Sozio SM, MD, Armstrong PA, Coresh J, Jaar BG, Fink NE, Plantinga LC, Powe NR, Parekh RS. “Cerebrovascular disease incidence, characteristics, and outcomes in patients initiating dialysis: the choices for healthy outcomes in caring for ESRD (CHOICE) study.” Am J Kidney Dis. 2009 Sep;54(3):468-77. doi: 10.1053/j.ajkd.2009.01.261. Epub 2009 Apr 19.
  5. Sperati CJ, Parekh RS, Berthier-Schaad Y, Jaar BG, Plantinga L, Fink N, Powe N, Smith MW, Coresh J, Kao WHL. “Association of single nucleotide polymorphisms in JAK3, STAT4, and STAT6 with new cardiovascular events in incident dialysis patients.” Am J Kidney Dis. 2009 May;53(5):845-55. doi: 10.1053/j.ajkd.2008.12.025. Epub 2009 Mar 12.

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