Steven Paul Keller, M.D., Ph.D., M.Phil.

Headshot of Steven Paul Keller
  • Assistant Professor of Medicine

Specializes in: Adults (18+ years)



Acute Lung Injury (ALI), Critical Care Medicine, Extracorporeal Membrane Oxygenation (ECMO), Internal Medicine, Mechanical Circulatory Support more


Dr. Keller joined the Division of Pulmonary and Critical Care Medicine in March 2021 as an Assistant Professor and currently attends in the medical intensive care unit and the cardiac surgical intensive care unit. His primary clinical interest is care of patients with critical illness with a focus on advanced mechanical support of respiratory and circulatory failure.  

Prior to joining Johns Hopkins, Dr. Keller was faculty at Harvard Medical School and an attending physician at Brigham and Women's Hospital where he served as the inaugural Medical Director of the Extracorporeal Membrane Oxygenation Service. Clinically, he attended on the lung transplant service and also in the medical intensive care unit and cardiac surgical intensive care unit. 

He received his medical degree from Stanford University and completed residency training in internal medicine at the Massachusetts General Hospital prior to completing fellowship training in pulmonary and critical care medicine at Johns Hopkins Hospital and the National Institutes of Health. Before pursuing a career in medicine, Dr. Keller received his undergraduate degree from Purdue University in electrical engineering and his master’s in semiconductor physics at Cambridge University where he studied as a Churchill Scholar. He received his doctorate in medical engineering from the Massachusetts Institute of Technology where he was awarded the Department of Defense and National Science Foundation graduate fellowships.

Dr. Keller conducts translational research on mechanical circulatory support, organ-device interactions, and extracorporeal organ perfusion. more


  • Assistant Professor of Medicine
  • Assistant Professor of Biomedical Engineering

Departments / Divisions



  • MD; Stanford University School of Medicine (2007)


  • Internal Medicine; Massachusetts General Hospital (2009)
  • Internal Medicine; Massachusetts General Hospital (2011)


  • Pulmonary and Critical Care Medicine; Johns Hopkins University School of Medicine (2015)
  • Critical Care Medicine; National Institutes of Health (2013)
  • Pulmonary and Critical Care Medicine; Stanford University Medical Center (2009)

Board Certifications

  • American Board of Internal Medicine (Critical Care Medicine) (2016)
  • American Board of Internal Medicine (Internal Medicine) (2012)
  • American Board of Internal Medicine (Pulmonary Disease) (2015)

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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