Mark J. Fesler, MD, is a hematology oncologist in his eleventh year as associate professor of internal medicine at Saint Louis University. He was formerly the director of the Blood and Marrow Transplant Program at SSM Saint Louis University hospital. He is a member of the American Society of Hematology and the American Society of Transplant and Cellular Therapy and has expertise in hematological malignancies including Hodgkin and non-Hodgkin lymphoma, multiple myeloma, acute myeloid leukemia, acute lymphoblastic leukemia, chronic lymphocytic leukemia, chronic myeloid leukemia, and myelodysplastic syndrome.
Dr. Fesler earned a medical degree from Saint Louis University School of Medicine, followed by internal medicine residency at the University of Colorado Health Sciences Center, where he was chief resident in his final year. He completed a fellowship in hematology and oncology at Saint Louis University School of Medicine and is board-certified in both hematology and medical oncology.