Marianne Nellis, M.D., M.S.

Pediatric Critical Care Medicine

Locations and Appointments

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Personal Statement

I specialize in the care of the critically ill child. Though it is a difficult time and involves complex care, my goal is to make the experience of a child in our ICU and their family as smooth as possible. This is accomplished through compassionate care and frequent communication. In addition, through my research endeavors, I hope to make the transfusion of blood products to children as safe as possible.

Biographical Info

Dr. Marianne Nellis graduated from Colgate University with a BA in biochemistry in 1999. She received her medical degree from Johns Hopkins School of Medicine in 2003. After completing her residency in pediatrics at NewYork-Presbyterian Hospital/Weill Cornell Medical Center, she served an additional year as chief resident. Dr. Nellis worked abroad in pediatric intensive care units at Soroka University Medical Center (in Beersheva, Israel) and Safra Children’s Hospital at Sheba Medical Center (in Tel Aviv, Israel). She returned to the United States and NewYork-Presbyterian Hospital/Weill Cornell Medical Center to complete her fellowship training in pediatric critical care medicine. 

Dr. Nellis has also completed a Masters in Clinical Investigation. Her research interests involve transfusion medicine.

Honors and Awards
  • May 2017. New York Super Doctor - Rising Star
  • June 2012. Department of Pediatrics Fellow Award for Teaching Excellence
  • May 2006. NewYork-Presbyterian/Weill Cornell Medical College Distinguished Housestaff Award
  • May 1999. Phi Beta Kappa
Board Certifications
American Board of Pediatrics
American Board of Pediatrics (Pediatric Critical Care Medicine)
Clinical Expertise
Transfusion Medicine
Trauma In Pediatric Patient
Respiratory Failure, Acute
Asthma With Severe Asthma Attack
Intensive Care After Cardiac Surgery
  • M.S.
    Weill Graduate School of Medical Sciences of Cornell University
  • M.D.
    The Johns Hopkins University School of Medicine
  • B.S.
    Colgate University
  • Associate Attending Pediatrician
    NewYork-Presbyterian Hospital
  • Associate Professor of Pediatrics
    Weill Cornell Medical College, Cornell University
  • John D. & Lili R. Bussel, M.D. Associate Professor in Pediatric Hematology
    Weill Cornell Medical College, Cornell University

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No External Relationships Reported