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Mitchell I. Fenster, MD

Dr. Fenster has been practicing internal medicine with the Mount Pleasant Medical Group for the past 28 years prior to joining Westchester Health. He provides preventative care and treatment for acute and chronic illness to patients above the age of 18. Dr. Fenster’s kind, professional, and persistent manner endears him to his loyal multigenerational group of patients. Castle Connolly and Westchester Magazine have included Dr. Fenster in their lists of Top Doctors.


  • Internal Medicine


  • Medical School

    The Mount Sinai School of Medicine, New York
  • Internship/Residency

    New York University-Bellevue Medical Center, New York


White Plains Hospital Center, White Plains, NY

Board Certifications

American Board of Internal Medicine

Professional Organizations

  • Medical Society, State of New York
    American Medical Association

Please call the number below to schedule an appointment: (914) 769-0268


465 Columbus Avenue
Suite 125
Valhalla, NY 10595
Fax: (914) 769-6303

Office Hours
Mon - Fri: 9:00am - 5:00pm
Saturday: 9:00am - 1:00pm