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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. Nicholas Mayer:

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Patient Reviews

Patient comments (0)

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

Specialties & Research

Dr. Nicholas Mayer, DO is board certified in Internal Medicine and Nephrology.

Education & Awards

Dr. Mayer graduated from A.T. Still University - Kirksville.


Dr. Mayer has 5 hospital affiliations:

  • Depaul Health Center 
  • Gateway Regional Medical Center 

> > > > Dr. Nicholas Mayer, DO

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Additional Information
Dr. Nicholas John Mayer DO is a male Internist, has 7 years of experience and practices in Internal Medicine and Nephrology.
Where does Dr. Nicholas J. Mayer practice?
Dr. Nicholas Mayer has 4 office locations.
Dr. Nicholas Mayer practices Internal Medicine and Nephrology near Saint Louis, MO.
Additional practice locations include: Granite City, IL and Festus, MO.
See Saint Louis Internists and Saint Louis Nephrologists.