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David T. Ennis, MD

Dr. Ennis has practiced internal medicine for 25 years. After training and board certification at Westchester Medical Center, he completed a primary care fellowship and a position of Instructor of Medicine at New York Medical College. He has specialized in preventive medicine as it pertains to the treatment and prevention of cardiovascular disease and cancer. Recently, Dr. Ennis was named to Castle Connolly’s Top Regional Doctors.


  • Internal Medicine


  • Medical School

    New York Medical College, Valhalla, NY

  • Internship/Residency and Fellowship

    New York Medical College, Valhalla, NY


Northern Westchester Hospital

Board Certifications

Internal Medicine

Professional Organizations

  • Westchester County Medical Society
    Medical Society of the State of New York

Please call the number below to schedule an appointment: (914) 962-3500


1838 Commerce Street
Yorktown, NY 10598

Fax: (914) 245-7875

Office Hours:
Monday - Friday mornings:
7:00am - 2:00pm

* Wednesdays last patient at 11:30am

Monday thru Friday afternoons
available for sick visits and pre ops.
 *Excluding Wednesdays
Please note: Office closes for lunch and
paper work from 11am – 12:30pm