Sara Keller, MD, MPH, MSPH, is an Associate Professor of Medicine in the Division of Infectious Diseases at the Johns Hopkins University School of Medicine. She has joint appointments as Associate Faculty in the Armstrong Institute for Patient Safety, and in the Health Policy and Management Department of the Johns Hopkins University Bloomberg School of Public Health. Her research focuses on expanding healthcare epidemiology and antibiotic stewardship to the outpatient setting, using quantitative and qualitative methods, and applying a human factors engineering framework. She has particularly been recognized for her expertise in improving the quality of care of patients on outpatient parenteral antimicrobial therapy (OPAT), central line-associated bloodstream surveillance and prevention in home infusion therapy, and implementing antibiotic stewardship programs in ambulatory clinics. Her research is funded by the Agency for Healthcare Research and Quality, the Centers for Disease Control and Prevention, and the National Institute on Aging.

Dr. Keller graduated from Duke University School of Medicine in 2007 and received a Public Health degree with a specialization in epidemiology from the University of North Carolina at Chapel Hill in 2006. She completed her internship and residency in internal medicine at Johns Hopkins University School of Medicine in 2010, then transitioned to the University of Pennsylvania for her infectious diseases training in 2013. She completed a two-year simultaneous fellowship in the University of Pennsylvania Centers for Healthcare Improvement and Patient Safety, and received a Masters in Health Services Research.

She also developed and serves as Director of the Patient Safety and Quality Improvement Pathway for Johns Hopkins University School of Medicine Osler Medical Residency Program and directs the Johns Hopkins OPAT Program.