Current Fellows

Patient Safety Research Fellows

Donald E. Dietz, MD

Dr. Dietz is a Fellow in Patient Safety Research. He graduated from SUNY Downstate College of Medicine in 2014 and completed his internal medicine residency at New York Presbyterian-Columbia University Medical Center in 2017. He also worked as a hospitalist for two years at UCLA-David Geffen School of Medicine and then returned to Columbia for fellowship in infectious diseases, which concluded in 2021. His research interests lie at the intersection of infectious diseases and patient safety, including improving methods of antimicrobial and diagnostic stewardship and reducing hospital-acquired infections.


Amanda Esteves, MD
Patient Safety Research Fellow

Amanda Esteves, MD


Dr. Esteves is a Pediatric Patient Safety Research Fellow.  She graduated from Cooper Medical School of Rowan University in 2017 and completed her pediatric residency at NewYork Presbyterian Columbia University Medical Center in 2020. She stayed at Columbia for an additional year as Pediatric Chief Resident. Her interest are the intersection of patient safety and health equity in the outpatient general pediatric setting with a particular focus on early childhood.





Anne Grauer, MD


Dr. Grauer is a Patient Safety Research Fellow.  She graduated from The Donald and Barbara Zucker School of Medicine at Hofstra/Northwell in 2016.  Dr. Grauer then went on to complete her internship at NYU School of Medicine and residency at New York-Presbyterian Hospital-Weill Cornell Medical Center in 2020.  Her research interests include patient safety, EHR optimization and the use of Clinical Decision Support tools. 




Benjamin L. Ranard, MD, MSHP


Dr. Ranard is currently a Patient Safety Research Fellow as well as a Chief Fellow in Pulmonary and Critical Care Medicine at NewYork-Presbyterian/Columbia University Irving Medical Center. He received his Doctor of Medicine and Master of Science in Health Policy Research from the University of Pennsylvania Perelman School of Medicine in 2016. He completed his Internal Medicine internship and residency at Duke University Medical Center in 2019. His research interests include sepsis quality and outcomes, electronic health record optimization, clinical decision support, alert fatigue, and care redesign.






Past Fellows

Danielle Carter, MD


Dr. Carter is a clinical research fellow within the Division of General Medicine. She graduated from University of Chicago Pritzker School of Medicine and completed internal medicine residency at New York Presbyterian-Columbia University Medical Center in 2020. Her research interests include patient safety, reducing hospital acquired infections, and health IT systems. 

Amanda Rosen, MD 


Dr. Rosen is a research fellow within the Division of General Medicine.  She graduated from Northwestern University's Feinberg School of Medicine in 2017 and completed her internal medicine residency at New York Presbyterian- Columbia University Medical Center in 2020.  Her research interests include biomedical ethics, patient safety, and critical care.

Jerard Z. Kneifati-Hayek, MD, MS

(2018 – 2020)

Dr. Kneifati-Hayek is the first Hospitalist Patient Safety Research Fellow. He graduated from Weill Cornell Medicine in 2014 and was a Howard Hughes Medical Institute research fellow. Dr. Kneifati-Hayek finished his residency in 2017 at New York Presbyterian-Weill Cornell Medicine. His interests include patient safety and quality, and health outcomes research.

Pooja Reddy, MD, MS

(2019 – 2021)

Dr. Reddy is a Pediatric Patient Safety Research Fellow. She graduated from Emory University School of Medicine in 2015 and completed residency at the Children’s Hospital at Montefiore in 2018. She is also concurrently training as a Pediatric Gastroenterology fellow in her second year. Her interests include patient safety, efficient use of medical resources, and cost reduction in medicine.