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License & Identifications

A medical license is required for a doctor to practice medicine in a particular state. Requirements vary by state but most require, at a minimum, post-graduate training in the doctor’s specific specialty. An NPI number is a national identifier unique to an individual health care provider and is managed by the Center for Medicare & Medicaid Services (CMS).

Learn more about Dr. William Kessler:

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Education & Awards

Dr. Kessler graduated from University of Illinois at Chicago.


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Additional Information
Dr. William Kessler MD is a male Family Practitioner and practices in Family Medicine.
Where does Dr. William Kessler practice?
Dr. William Kessler has 1 office location.
Dr. William Kessler practices Family Medicine near Castro Valley, CA.
See Castro Valley Primary Care Doctors.