Our Team


  • Jason Adelman, MD, MS

    • Executive Director/Chief Patient Safety Officer
    Headshot of Jason Adelman.
  • Jo Applebaum, MPH

    • Director of Research Science

    Jo Applebaum, MPH is Director of Research Science, Patient Safety Research at Columbia University Irving Medical Center/NewYork-Presbyterian Hospital. Jo oversees the Center for Patient Safety Research’s portfolio of grant-funded and hospital-supported research projects, guiding the team on research design, methodology, and interpretation and dissemination of results. She has expertise in quantitative, qualitative, and mixed-methods approaches. Previously, Jo was Director of Research and Evaluation at Community Pediatric Programs, a federally qualified health center program affiliated with Montefiore Medical Center and Children’s Health Fund, where she led the development, implementation, and evaluation of the Center’s health initiatives. Jo received her MPH from the Mailman School of Public Health at Columbia University and BA from Johns Hopkins University.

    Headshot of Jo Applebaum, MPH.
  • I-Fong Lehman, DrPH, MS

    • Director

    Dr. Lehman is the Director of the Center for Patient Safety Research where she is responsible for overall operations including grant and contract activities. Previously, she was the Director of Quality and Patient Safety at NewYork-Presbyterian Hospital/Columbia University overseeing Columbia Milstein, The Allen Hospital and Lawrence Hospital. Prior to joining NYPH, she was the Director of Clinical Communities at The Johns Hopkins’ Armstrong Institute for Patient Safety and Quality. She earned her DrPH in Health Policy and Management from Johns Hopkins School of Public Health and her MS in Health Policy and Administration from the Harvard School of Public Health.


  • Yelstin Fernandes, BS

    • Programmer

    Yelstin joined the Center for Patient Safety Research in 2018 as a Programmer.  He is responsible for organizing, analyzing, and leveraging healthcare data in order to develop programmatic tools that support the team's ongoing research and operational duties.  Yelstin comes from a background in biology research holding a B.S. in Microbiology from the University of Rochester.  Additionally, he was exposed to patient care and safety as an EMT-B, and began to code as a hobby.  He is excited to now be using data analytics to reduce medical errors.  In his spare time Yelstin enjoys baseball, cooking, and travel.

    Headshot of Yelstin Fernandes, BS.

Patient Safety Research Fellows

  • Danielle Carter, MD

    • (2020–2022)

    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. 

  • Anne Grauer, MD

    • (2020-2022)

    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. 

    Head shot of Annie Grauer
  • Amanda Rosen, MD

    • (2020-2022)

    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.  

  • Donald E. Dietz, MD

    • (2021-2023)

    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.

    Head shot of Donald Deitz
  • Amanda Esteves, MD

    • (2021-2023)

    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.

    Amanda Esteves, MD
  • Benjamin L. Ranard, MD, MSHP

    • (2021-2023)

    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.

    Benjamin Ranard, MD, MSHP

Past Fellows

  • 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.


Program Advisors

Columbia University Irving Medical Center
  • Donald Landry, MD, PhD
  • Graham Barr, MD, DrPH
  • George Hripcsak, MD, MS
  • Steven Shea, MD, MS
  • Melissa Stockwell, MD, MPH
NewYork-Presbyterian Hospital
  • Craig Albanese, MD, MBA
  • Daniel Barchi, MEM
  • Laureen Hill, MD, MBA
NewYork-Presbyterian Hospital Queens
  • Joseph Cooke, MD
Harvard University
  • Hojjat Salmasian, MD, PhD
Albert Einstein College of Medicine
  • William Southern, MD, MS