Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Jeffrey David Klausner, MD

Individual provider Internal Medicine Physician · NPI 1508973249

Jeffrey David Klausner, MD is an Infectious Disease in San Leandro, California. Graduated from Js Weill Medical College, Cornell University in 1991, 35 years ago. Practices with Bass Medical Group, a 292-clinician group, works from 2 locations, accepts Medicare assignment and offers telehealth. Licensed in California.

Years since qualifying
35
Trained at
Js Weill Medical College, Cornell University
Licensed in
CA
In the registry since
2006
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

201 Dolores Ave
San Leandro, CA 94577-5007
Phone: (510) 984-2489
Fax: (510) 788-6830
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 1970 Mountain Blvd, Oakland, CA 94611-2813 — (510) 984-2489

Specialties & licences

Infectious Disease Physician (primary) Taxonomy 207RI0200X · Licence G81840 (CA)
Internal Medicine Physician Taxonomy 207R00000X · Licence G81840 (CA)

Record details

NPI number1508973249
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedAugust 25, 2006
Last updated in NPPESDecember 16, 2025
Certification dateDecember 16, 2025
Mailing address201 Dolores Ave, San Leandro, CA 94577-5007

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyINFECTIOUS DISEASE
Medical schoolJS WEILL MEDICAL COLLEGE, CORNELL UNIVERSITY
Graduated 1991 (35 years in practice)
Group practice Bass Medical Group — 292 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations5 on file with Medicare

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