Peter Maslak, MD -- Chief, Hematology Laboratory Service

Peter Maslak, MD



Chief, Immunology Laboratory Service

Clinical Expertise

Acute and Chronic Leukemias; Hematology; Autologous Stem Cell Transplantation; Myelodysplasia; Flow Cytometry

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Dr. Maslak accepts the following list of insurance providers. Select your insurance provider to see more details.

Contact and Location

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About Me


MD, Mount Sinai School of Medicine


University of Michigan Medical Center; Memorial Sloan Kettering Cancer Center


Memorial Sloan Kettering Cancer Center

Board Certifications

Internal Medicine; Medical Oncology; Hematology

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 Immunology 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.

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).


Doctors at Memorial Sloan Kettering work as teams, with specialists from all different areas. This allows us to consider all your needs together, and to give you the best possible care.

Clinical Trials

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Find a Clinical Trial for You

Memorial Sloan Kettering's doctors and scientists are constantly developing new treatments for cancer. MSK is typically running hundreds of clinical trials at a given time.

You may be able to participate in a clinical trial even if you are new to MSK. Search our online directory to find trial information and see more about who can participate.

Research and Publications

Publications on PubMed

Visit PubMed for a full listing of Dr. Maslak’s journal articles. Pubmed is an online index of research papers and other articles from the US National Library of Medicine and the National Institutes of Health.