About Molly Smith, MD

Mariel (Molly) Smith is an attending physician in Pediatric Hematology/Oncology at MassGeneral Hospital for Children.  Dr. Smith grew up on Long Island and then attended Wellesley College where she obtained a B.A. in Neuroscience and also minored in Psychology.  She then went on to obtain her medical degree from Weill Cornell Medical College in New York City.  Dr. Smith remained at New York Presbyterian Hospital-Cornell for her Pediatrics residency and then did a Chief Resident year in Pediatrics at Memorial Sloan Kettering Cancer Center.  During her residency she became interested in pediatric hemostasis/thrombosis and completed a research project evaluating the incidence of venous thrombosis in pediatric intensive care unit patients, and associated risk factors.  She then completed her fellowship training in Pediatric Hematology/Oncology at the joint Memorial Sloan Kettering/New York Presbyterian Hospital-Cornell program.  Her research during fellowship focused on the identification of targeted combination therapies for alveolar rhabdomyosarcoma.  Dr. Smith's principal clinical interests include the care of children with disorders of hemostasis and thrombosis, and with hematologic malignancies.  

Clinical Interests:



Mass General for Children: Pediatric Hematology & Oncology
55 Fruit St.
Yawkey Center for Outpatient Care
Suite 8B
Boston, MA 02114
Phone: 617-726-2737

Medical Education

  • MD, Weill Cornell Medical College
  • Residency, Memorial Sloan Kettering Cancer Center
  • Residency, New York Presbyterian Weill Cornell Campus
  • Fellowship, Memorial Sloan Kettering Cancer Center

American Board Certifications

  • Pediatric Hematology-Oncology, American Board of Pediatrics
  • Pediatrics, American Board of Pediatrics

Accepted Insurance Plans

Note: This provider may accept more insurance plans than shown; please call the practice to find out if your plan is accepted.


  • Niewold TB, Wu SC, Smith M, Morgan GA, Pachman LM. Familial aggregation of autoimmune disease in juvenile dermatomyositis. Pediatrics. 2011 May; 127(5):e1239-46. Doi: 10.1542/peds.2010-3022. PMID: 21502224.

    Kramer K, Smith M, Souweidane MM. Safety profile of long-term intraventricular access devices in pediatric patients receiving radioimmunotherapy for central nervous system malignancies. Pediatric Blood and Cancer. 2014 Sept; 61(9):1590-2.

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