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Dr. Eileen Katherine Nenninger, MD

Infectious Disease Physician in San Leandro, CA · enumerated 2016 · practices at Diablo Infectious Disease Consultative Service Med Grp Inc.

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

National Provider Identifier

1295199966

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Registry record

Entity type Individual (Type 1)
Name Dr. Eileen Katherine Nenninger
Credential MD
Sex Female
Practice address 13851 E 14th St Ste 308, San Leandro, CA, 94578
Phone (925) 463-1318
Enumeration date Apr 8, 2016
Last updated in NPPES Aug 8, 2023

Taxonomy & licenses

207RI0200X Infectious Disease Physician Allopathic & Osteopathic Physicians · License A186925 (CA) Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

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

What is the NPI number for Eileen Nenninger?
The National Provider Identifier (NPI) for Eileen Nenninger is 1295199966, a Type 1 (individual) record in the CMS NPPES registry.
Where does Eileen Nenninger practice?
The practice location on file with NPPES is in San Leandro, CA. Providers can have multiple locations; NPPES lists the primary practice address.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-08-08.