Browse Health
Nephrologist (kidney)
24 years of experience
Accepting new patients
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).

Patient Reviews

Patient comments (2)

The overall average patient rating of Dr. John Riordan is Excellent. Dr. Riordan has been reviewed by 7 patients who have provided 2 comments. The rating is 5 out of 5 stars.

Patient Ratings
Ease of Appointment 5.0
Promptness 5.0
Courteous Staff 5.0
Accurate Diagnosis 5.0
Bedside Manner 5.0
Spends Time with Me 5.0
Follows Up After Visit 5.0

Specialties & Research

Dr. John Riordan, MD is board certified in Nephrology.

Education & Awards

Dr. Riordan graduated from The University of Texas at Galveston. He has 2 awards.

Castle Connolly America's Top Doctors® (2002 - 2008, 2010 - 2015)
Compassionate Doctor Recognition (2014)


Dr. Riordan has 6 hospital affiliations:

  • California Pacific Medical Center - Davies Campus 
  • California Pacific Medical Center- Davies Campus 


  • Spanish
  • English

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Additional Information
Dr. John William Riordan MD is a male Nephrologist, has 24 years of experience and practices in Nephrology.
Where does Dr. John W. Riordan practice?
Dr. John Riordan has 3 office locations.
Dr. John Riordan practices Nephrology near San Francisco, CA.
See San Francisco Nephrologists.