Mark B. Geyer, MD

1275 York Avenue Between 67th and 68th Streets
New York NY 10065
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Memorial Sloan Kettering hematologic oncologist Mark Geyer specializes in caring for people with leukemia. He also studies new ways to use immunotherapy to treat leukemias. For general information, call Memorial Sloan Kettering at 212-639-2000, 24 hours a day, seven days a week. To make an appointment, call us at 800-525-2225, Monday through Friday between 8:30 AM and 5:30 PM ET.