Jeffrey L. Halaas MD 185 New York 312 Brewster, New York, 10509 Phone: 845-278-7000 Company: CareMount Medical; Northern Westchester Hospital, Putnam Hospital Center: Breast Cancer, Leukemia & Lymphoma, Ovarian Cancer, Lung Cancer Doctor Category: Oncology-Hematology Profile Let this business know you found them on Hudson Valley's Online Directories. Locations Brewster 185 New York 312 Brewster, New York 10509 Claim/Edit Listing