Pictured: Alexander Geyer

Alexander I. Geyer, MD



Clinical Director

Clinical Expertise

Sarcoidosis; Asthma; Pulmonary Involvement in Patients with Hematologic Cancers; Chronic Respiratory Failure

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Accepted Insurance Providers

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

Contact and Location

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Memorial Sloan Kettering has locations throughout New York City, Long Island, New Jersey, and Westchester. These locations offers many services, including screening, chemotherapy, and medical testing.

About Me


MD, New York University School of Medicine


Massachusetts General Hospital


Harvard Combined (Massachusetts General Hospital, Brigham and Women's Hospital, Beth Israel Deaconess Hospital)

Board Certifications

Internal Medicine; Pulmonary Disease; Critical Care Medicine

My clinical interests center on pulmonary disorders in the immunocompromised host, such as patients with hematologic malignancies and/or hematopoietic stem cell transplant (HSCT) recipients. In addition, I have extensive experience in diagnosis and management of sarcoidosis. Other areas of expertise include pulmonary nodules and pleural effusions, including diagnostic and therapeutic procedures such as bronchoscopy, thoracentesis, and indwelling pleural catheter placement.

I am the associate program director for MSK’s pulmonary fellowship and have a strong interest in medical education. I am involved in several research projects including epidemiology and pathogenesis of dasatinib-induced pleural effusions, pulmonary function testing in patients undergoing HSCTs, and the epidemiology of pulmonary complications in HSCT recipients.


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.