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

Dr. James K. Yan, DO

Individual provider Gastroenterology Physician · NPI 1588683890

Dr. James K. Yan, DO is a Gastroenterology in San Francisco, California. Graduated from College of Osteo Med of the Pacific at Pomona in 1991, 35 years ago. Practices as a sole proprietor and accepts Medicare assignment. Licensed in California.

Years since qualifying
35
Trained at
College of Osteo Med of the Pacific at Pomona
Licensed in
CA
In the registry since
2006
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

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Practice location Address checks out

728 Pacific Ave Ste 305
San Francisco, CA 94133-4449
Phone: (415) 781-1818
Fax: (415) 781-1889
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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 20AX6238 (CA)

Record details

NPI number1588683890
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorYes
NPI enumeratedJuly 18, 2006
Last updated in NPPESJuly 8, 2007

Medicare enrollment

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

Medicare specialtyGASTROENTEROLOGY
Also practisesINTERNAL MEDICINE
Medical schoolCOLLEGE OF OSTEO MED OF THE PACIFIC AT POMONA
Graduated 1991 (35 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 on file with Medicare

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