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William B. Dieck, MD, FAAO

Dr. Dieck specializes in Ophthalmology and is an eye surgeon Board-Certified by the American Board of Ophthalmology. Dr. Dieck has practiced in our community for the past 26 years diagnosing and treating glaucoma, cataract, macular degeneration and dry eye disease, among other medical eye diseases. He specializes in anterior segment refractive cataract surgery, including the use of advanced technology bifocal and astigmatism intraocular lens implants. He is the Medical Director of the Ophthalmology division of Westchester Health Associates and a past Chairman of the Department of Ophthalmology at Northern Westchester Hospital. Dr. Dieck is a recipient of the Castle Connolly Top Physician Award for the past 15 years.


  • Ophthalmology


    • Undergraduate

      St. Lawrence University: Phi Beta Kappa and Presidential Scholar
      B.S. Biology, Magna Cum Laude
    • Medical School

      New York Medical College Doctor of Medicine
    • Internship and Residency

      New York Medical College: Internal Medicine
      Ophthalmology, Chief resident
  • Appointment

    Northern Westchester Hospital

Professional Organizations

  • American Academy of Ophthalmology
    New York State Ophthalmologic Society

Please call the number below to schedule an appointment: (914) 666-4939


185 Kisco Avenue, Suite 500
Mt. Kisco, NY 10549
Fax: (914) 242-7209

Office Hours
Monday: 8:00am - 5:00pm
Tuesday: 8:00am - 5:00pm
Wednesday: 9:00am - 5:00pm
Thursday: 8:00am - 5:00pm
Friday: 8:00am - 5:00pm
Phone lines open at 9:00am