Marlene Stephanie Williams, M.D.

Headshot of Marlene Stephanie Williams
  • Clinical Director of Cardiology, Johns Hopkins Bayview Medical Center
  • Associate Professor of Medicine

Languages: English, French


Acute Coronary Care, Acute Coronary Syndrome (ACS), Acute Myocardial Infarction (AMI), Angina, Atrial Fibrillation, Cardiac Disease, Cardiac Imaging, Cardiology, Cardiomyopathy, Cardiopulmonary Resuscitation, Cardiovascular Disease, Cardiovascular Disease in Women, Cardiovascular Medicine, Cardiovascular Risk Stratification, Chest Pain, Clinical Cardiology, Congestive Heart Failure (CHF), Coronary Artery Disease, Coronary Care Unit, Critical Care Cardiology, Dyslipidemia, Echocardiography, General Cardiology, Heart Attack, Heart Disease, Heart Disease Prevention and Treatment in Women, High Blood Pressure (Hypertension), High Cholesterol, Non-invasive Imaging, Stress Testing, Transesophogeal Echocardiography (TEE), Women's Health more

Research Interests

Antiplatelet Therapy; Platelet Function and Genotyping in Acute Coronary Syndrome; Aspirin Resistance more

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Johns Hopkins Bayview Medical Center

Appointment Phone: 443-997-0270
4940 Eastern Avenue
Baltimore, MD 21224 map
Fax: 410-550-1183


Dr. Marlene Stephanie Williams is an Associate professor at the Johns Hopkins University School of Medicine. Her research focuses on coronary atherosclerosis and platelet function, and her particular focus is on platelet function as it relates to the acute coronary syndrome.

Dr. Williams has examined platelet function and its correlation to platelet functional genomics and runs a platelet physiology laboratory on the Johns Hopkins Bayview campus. The goal for her cardiovascular platelet laboratory has been to identify the etiology of platelet dysfunction in many disease states and apply methods that may improve this dysfunction that may eventually be translated to therapies for patients with cardiovascular disease. She is a prior recipient of an NIH career mentored award (K23) examining platelet functional genomics and an NIH RO1 award addressing platelet serotonin signaling in depression and heart disease. Dr. Williams has several publications covering platelet functional changes in settings of interventional cardiology, acute coronary syndrome, and heart disease and depression. She has participated in several NHLBI advisory committees, review groups, and study sections.

Dr. Williams has been the Course Director, of the advanced clinical clerkship in coronary intensive care at the Bayview Medical center and has mentored many medical residents and cardiology fellows.

Dr. Williams received her undergraduate degree in biochemistry from McGill University. She earned a medical degree from the Columbia University College of Physicians & Surgeons and completed a residency at Johns Hopkins Hospital. After completing a residency, Dr. Williams was a cardiology fellow at Mount Sinai Hospital and Johns Hopkins Hospital.

Dr. Williams is currently the Clinical Director of Cardiology at Johns Hopkins Bayview Medical Center. more


  • Clinical Director of Cardiology, Johns Hopkins Bayview Medical Center
  • Associate Professor of Medicine

Departments / Divisions

Centers & Institutes



  • MD; Columbia University College of Physicians and Surgeons (1992)


  • Internal Medicine; Johns Hopkins University School of Medicine (1995)


  • Cardiology; Johns Hopkins University School of Medicine (1999)
  • Cardiology; The Mount Sinai Hospital (1998)

Board Certifications

  • American Board of Internal Medicine (Cardiovascular Disease) (1999)

Research & Publications

Research Summary

Research interests lie with coronary atherosclerosis and platelet function. The particular focus is on platelet function as it relates to the acute coronary syndrome.

Activities & Honors


  • Leadership Program for Women Faculty, Johns Hopkins University SOM, 2009 - 2010
  • Greatest Supporter, Johns Hopkins Bayview, Service Excellence, Progressive Care Unit- Exemplary demonstration of service excellence, 2008 - 2009


  • American College of Cardiology, 1992
  • Association of Black Cardiologists, 1992
  • American Federation for Medical Research, 2002

Professional Activities

  • Johns Hopkins Bayview Medical Center Internal Medicine Clinical Competence Committee, 2012
  • Faculty Senate Elected Representative, 2009 - 2014
  • Johns Hopkins Bayview Medical Center Collaborative Critical Care Joint Practice Committee, 2007
  • Service Excellence Committee, Johns Hopkins Bayview Medical Center, 2007
  • Johns Hopkins Department of Medicine Diversity Council, 2007

Patient Ratings & Comments

The Patient Rating score is an average of all responses to physician related questions on the national CG-CAHPS Medical Practice patient experience survey through Press Ganey. Responses are measured on a scale of 1 to 5, with 5 being the best score. Comments are also gathered from our CG-CAHPS Medical Practice Survey through Press Ganey and displayed in their entirety. Patients are de-identified for confidentiality and patient privacy.

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