James YanD.O.
Gastroenterology·San Francisco, CA
James Yan, D.O. is a Gastroenterology provider in San Francisco, CA affiliated with 1 ambulatory surgery center in CA, as of July 2026.
- NPI1588683890
- Registered2006
- Centers1
- StateCA
- Class of1991
Case volumes, referral patterns, and payer mix live in DataLily AI Insights.
Ambulatory surgery centers
Centers whose service lines match this provider’s. Affiliations change; verify independently.
Education
Education on record as of August 2026.
James Yan at a glance
- Provider
- James Yan
- Credential
- D.O.
- Specialty
- Gastroenterology
- Procedures
- Gastroenterology CPT codes
- Location
- San Francisco, CA
- Medical school
- College of Osteo Med of the Pacific at Pomona
- Graduated
- 1991
- NPI registered
- 2006
- NPI
- 1588683890
- Snapshot
- July 2026
Identity, specialty, and affiliations change over time. This is not an endorsement, and not clinical, billing, or legal advice. Providers may request corrections at founders@datalilyai.com. Read the DataLily AI data methodology.
Questions
Where does James Yan practice?
James Yan, D.O. is based in San Francisco, CA and is affiliated with 1 ambulatory surgery center: Golden Gate Endoscopy Center LLC in San Francisco, CA. Affiliations reflect the current DataLily AI snapshot (July 2026) and can change.
What is James Yan's NPI number?
James Yan's National Provider Identifier (NPI) is 1588683890, registered in 2006. Specialty on record: Gastroenterology; credential D.O.
Where did James Yan go to medical school?
James Yan, D.O. attended College of Osteo Med of the Pacific at Pomona, graduating in 1991.
How many Gastroenterology providers in California work at ambulatory surgery centers?
547 Gastroenterology surgeons and proceduralists in California are affiliated with ambulatory surgery centers in DataLily AI's current snapshot, James Yan among them. The California Gastroenterology directory lists each one by city with credential, NPI, and center affiliations.
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