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Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Nicholas John Mayer, D.O.

Nephrology Physician in Florissant, MO · enumerated 2008 · practices at St Louis Kidney Care LLC.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1104075597

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Registry record

Entity type Individual (Type 1)
Name Dr. Nicholas John Mayer
Credential D.O.
Sex Male
Practice address 1265 Graham Rd Ste 1, Florissant, MO, 63031
Phone (314) 741-1600
Fax (314) 741-1677
Enumeration date Sep 10, 2008
Last updated in NPPES May 22, 2024

Taxonomy & licenses

207RN0300X Nephrology Physician Allopathic & Osteopathic Physicians · License 036123985 (IL) Secondary
207RN0300X Nephrology Physician Allopathic & Osteopathic Physicians · License 2009007663 (MO) Primary
DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO credential

Other identifiers

Identifier Type State Issuer
1104075597 Medicaid MO -
300117440001 Medicaid IL -

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

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Frequently asked questions

Where does Nicholas Mayer practice?
The practice location on file with NPPES is in Florissant, MO. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Nicholas Mayer?
The National Provider Identifier (NPI) for Nicholas Mayer is 1104075597, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-05-22.