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

John Alfred Hirshleifer, MD

Individual provider Internal Medicine Physician · NPI 1407893621

John Alfred Hirshleifer, MD is an Internal Medicine Physician in Oakland, California. Practices as a sole proprietor. Licensed in California.

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

1221 Broadway 3rd Fl
Oakland, CA 94612-1837
Phone: (510) 662-5894
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence G32352 (CA)
Occupational Medicine Physician Taxonomy 2083X0100X · Licence G32352 (CA)

Record details

NPI number1407893621
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedMay 31, 2006
Last updated in NPPESSeptember 29, 2016
Mailing address1221 Broadway, 3rd Floor, Oakland, CA 94612-1837

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