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

John W Pierce MD

Organization Internal Medicine Physician · NPI 1033485602

John W Pierce MD is an Internal Medicine Physician in San Francisco, California. Licensed in California. Registered with an NPI since 2012.

Licensed in
CA
In the registry since
2012

Practice location Address checks out

2480 Mission St Ste 329
San Francisco, CA 94110-2487
Phone: (415) 826-2438
Fax: (415) 826-2702
Show map & directions

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 number1033485602
Entity typeOrganization (Type 2)
Organization subpartNo
Authorized official Jessica Arias — Office Manager · (415) 826-2438
Other names Los Portales Family Medicine
NPI enumeratedMarch 28, 2012
Last updated in NPPESMarch 28, 2012
Mailing address2480 Mission St Ste 329, San Francisco, CA 94110-2487

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