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

Dr. John Winthrop Pierce, MD

Individual provider Internal Medicine Physician · NPI 1134232887

Dr. John Winthrop Pierce, MD is an Internal Medicine Physician in San Francisco, California. Practices as a sole proprietor. Licensed in California.

Licensed in
CA
In the registry since
2006
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

2480 Mission St Ste NO329
San Francisco, CA 94110-2468
Phone: (415) 826-2438
Fax: (415) 826-2702
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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 G45225 (CA)

Record details

NPI number1134232887
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedAugust 16, 2006
Last updated in NPPESNovember 29, 2012

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