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Memorial Day Hours

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COVID-19 Information and Updates
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Jeffrey L. Halaas, MD PhD

Jeffrey L. Halaas, MD PhD

Chair of Department of Oncology

Clinical Assistant Professor, Donald and Barbara Zucker School of Medicine at Hofstra/Northwell


Cancer Care Team

Lymphoma/Leukemia, GI malignancies, Lung cancer, Breast cancer, Gynecological cancers, Head and Neck malignancies, Melanoma & general Oncology and Benign Hematology

Accepting New Patients
New Cancer Patient Appointments: 1-844-484-3292


Carmel/Brewster Campus
185 New York 312
Southeast Executive Park
Brewster, NY 10509-2338

Monday, Tuesday, Thursday

Mount Kisco Campus - 90
90 South Bedford Road
Mount Kisco, NY 10549-3412

Wednesday, Friday

Awards & Recognition

Top Doctor Award – Westchester Magazine: 2013 - 2015

Best Doctor Award - New York Magazine: 2016

Castle Connolly Top Doctor: 2013 - 2015, 2017 - 2020

  • Westchester Magazine: 2013 - 2015, 2017
  • Hudson Valley Magazine: 2017-2020



Undergraduate & Graduate

Stanford University: 1990

Medical Education

MD: Weill Medical College of Cornell University: 1999
PhD: Rockefeller University: 1998


Department of Medicine
New York Presbyterian Hospital: 2000


Department of Medicine
New York Presbyterian Hospital: 2001


Medical Oncology/Hematology
Memorial Sloan Kettering Cancer Center: 2005

Board Certifications

Hematology: 2005, 2015
Medical Oncology: 2005, 2015
Internal Medicine: 2002


Hospital Affiliations

Putnam Hospital Center
Northern Westchester Hospital