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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. Gregory Marshall:

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  1. Qualifications
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Patient Reviews

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The overall average patient rating of Dr. Gregory Marshall is Average. Dr. Marshall has been reviewed by 2 patients who have provided 0 comments. The rating is 3 out of 5 stars.

Specialties & Research

Dr. Gregory Marshall, MD is board certified in Urology.

  • He has special expertise in 2 areas:
  • General Urology
  • Overactive Urinary Bladder

Education & Awards

Dr. Marshall graduated from University of Southern California , Los Angeles.


Dr. Marshall has 14 hospital affiliations:

  • Kaiser Foundation Hospital - Martinez/Walnut 
  • Kaiser Permanente Hospital - Oakland 

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Additional Information
Dr. Gregory Alan Marshall MD is a male Urologist, has 24 years of experience and practices in Urology.
Where does Dr. Gregory A. Marshall practice?
Dr. Gregory Marshall has 2 office locations.
Dr. Gregory Marshall practices Urology near Walnut Creek, CA.
See Walnut Creek Urologists.