Dalton joined HealthTree in 2024 as the MPNs and MDS Program Manager. He is passionate about helping patients gain a better understanding of their health and treatment and sees it as a way to help empower individuals and their families who are affected by these diseases. Prior to joining HealthTree Dalton earned a Master’s Degree in Oncological Sciences while studying various different blood cancers. When not interacting with patients he is an avid snowboarder and hiker.

Alexander Coltoff, M.D. received his medical degree from SUNY Downstate College of Medicine. He then completed his internal medicine residency at the Icahn School of Medicine at Mount Sinai, followed by a fellowship in Hematology/Oncology at New York Presbyterian - Columbia, both in New York. His clinical and research focus is on hematologic malignancies, particularly myeloproliferative neoplasms (MPNs), acute myeloid leukemia (AML), and myelodysplastic syndrome (MDS). He has been published as a clinical investigator and received an American Society of Hematology (ASH) award for developing research scientists.