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

James K. Yan, DO, Medical Office Inc

Organization Gastroenterology Physician · NPI 1609032283

James K. Yan, DO, Medical Office Inc provides Gastroenterology Physician services in San Francisco, California. Licensed in California. Registered with an NPI since 2008.

Licensed in
CA
In the registry since
2008
What do these letters mean?
Inc — Incorporated
A form of business registration, not a clinical qualification.

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Practice location Address checks out

728 Pacific Ave Ste 305
San Francisco, CA 94133-4457 Not confirmed with CMS for 18 years — call before visiting
Phone: (415) 781-1818
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Gastroenterology Physician (primary) Taxonomy 207RG0100X · Licence 20A6238 (CA)

Record details

NPI number1609032283
Entity typeOrganization (Type 2)
Organization subpartNo
Authorized official James Yan — Physician/Ceo · (415) 781-1818
NPI enumeratedAugust 2, 2008
Last updated in NPPESAugust 2, 2008
Mailing address728 Pacific Ave, Suite 305, San Francisco, CA 94133-4457

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