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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 Keyser:

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Education & Awards

Dr. Keyser graduated from University of Mississippi , Jackson.


Dr. Keyser has 2 hospital affiliations:

  • Novato Community Hospital 
  • Sonoma Valley Hospital 


  • English

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Additional Information
Dr. William G Keyser MD is a male Emergency Medicine Specialist, has 43 years of experience and practices in Emergency Medicine.
Where does Dr. William G. Keyser practice?
Dr. William Keyser has 8 office locations.
Dr. William Keyser practices Emergency Medicine near San Pablo, CA.
Additional practice locations include: San Leandro, CA and San Francisco, CA.
See San Pablo Emergency Physicians.