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Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Daniel T. Leininger, D.O.

Nephrology Physician in La Mesa, CA · enumerated 2017.

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

National Provider Identifier

1164956264

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Registry record

Entity type Individual (Type 1)
Name Daniel T. Leininger
Credential D.O.
Sex Male
Practice address La Mesa, CA, 91942
Phone (619) 461-3880
Fax (619) 461-3895
Enumeration date Apr 14, 2017
Last updated in NPPES Jan 16, 2026

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

207RN0300X Nephrology Physician Allopathic & Osteopathic Physicians · License 20A16789 (CA) 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
20A16789 Other CA MEDICAL LICENSE

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 Daniel Leininger?
The National Provider Identifier (NPI) for Daniel Leininger is 1164956264, a Type 1 (individual) record in the CMS NPPES registry.
Where does Daniel Leininger practice?
The practice location on file with NPPES is in La Mesa, 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 2026-01-16.