Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Jeffrey David Klausner, MD

Infectious Disease Physician in San Leandro, CA · enumerated 2006.

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

National Provider Identifier

1508973249

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Registry record

Entity type Individual (Type 1)

Name Jeffrey David Klausner

Credential MD

Sex Male

Practice address 201 Dolores Ave, San Leandro, CA, 94577

Phone (510) 984-2489

Fax (510) 788-6830

Enumeration date Aug 25, 2006

Last updated in NPPES Dec 16, 2025

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License G81840 (CA) Secondary

207RI0200X Infectious Disease Physician Allopathic & Osteopathic Physicians · License G81840 (CA) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
1508973249	Other	CA	CCS PANELED
00G818400	Medicaid	CA	-
1508973249	Medicaid	CA	-

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 Jeffrey Klausner practice?

The practice location on file with NPPES is in San Leandro, CA. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Jeffrey Klausner?

The National Provider Identifier (NPI) for Jeffrey Klausner is 1508973249, 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 2025-12-16.