About Me

I joined the faculty at Memorial Sloan Kettering as a hematologist in 1991, and just over a decade later took on the responsibility of Chief of the Hematology Laboratory Service. In this role, as well as in my capacity as Director of the Evelyn H. Lauder Breast Center and Associate Director of the Rockefeller Outpatient Pavilion, I am in charge of the laboratory tests done on our patients with blood-related (hematologic) diseases.

Read more

Over the years I have been involved in more than 20 clinical research trials to further refine and hone our approach to treating hematologic diseases such as leukemia and myelodysplastic syndrome (MDS). Based on these data, I have, in collaboration with my colleagues, published more than 170 journal articles, book chapters, and abstracts.

Among our current research projects is an attempt to find new therapies for acute and chronic leukemia that harness the power of the immune system. We are also making advances in finding new ways to measure certain characteristics of cells in blood-related cancers and other malignancies through a measurement test called flow cytometric assays. I hope also to develop cell markers in the laboratory that can help us advance our clinical research.

Over the years it has also been very edifying, and gratifying, to be active on a national and international level in many of my specialty’s organizations, such as the American Association for Cancer Research, the American Society of Clinical Oncology, and the American Society of Hematology. In 2010 I was invited to be an Oversees Fellow for the Royal Society of Medicine (UK).

  • Clinical Expertise: Acute and Chronic Leukemias; Hematology; Autologous Stem Cell Transplantation; Myelodysplasia; Flow Cytometry
  • Languages Spoken: English
  • Education: MD, Mount Sinai School of Medicine
  • Residencies: University of Michigan Medical Center; Memorial Sloan Kettering Cancer Center
  • Fellowships: Memorial Sloan Kettering Cancer Center
  • Board Certifications: Internal Medicine; Medical Oncology; Hematology

New Patient Appointments

Making an appointment

Call 800-525-2225


Visit PubMed for a full listing of Peter Maslak’s journal articles

Pubmed is an online index of biomedical articles maintained by the U.S. National Library of Medicine and the National Institutes of Health.

Clinical Trials

Research is integral to our mission at Memorial Sloan Kettering, and clinical trials help us discover better forms of patient care and treatment. For you, this could mean access to a new therapy or therapy combination. Click to see a list of the trials I’m currently leading.


Most major health insurers offer plans that include MSK as one of their in-network providers. If MSK is in-network, it means all our doctors are too. Medicaid and New York State Medicare also provide benefits for care at MSK.

Learn more