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JAMES K. YAN, D.O., MEDICAL OFFICE INC.
NPI 1609032283
Internal Medicine - Gastroenterology in San Francisco, CA

Active since August 02, 2008
728 PACIFIC AVE, SUITE 305, SAN FRANCISCO, CA 94133(415) 781-1818 Get Directions Write a Review

NPPES record last updated: August 2, 2008. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About James K. Yan, D.o., Medical Office Inc. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

JAMES K. YAN, D.O., MEDICAL OFFICE INC. (NPI 1609032283) is a healthcare organization registered as a gastroenterology in San Francisco, California and active in the NPI registry since August 2008. The organization lists James K. Yan, Physician/ceo, as its authorized official.

NPPES Registry Identity

NPI1609032283
Entity TypeOrganization
Primary Taxonomy207RG0100X
Legal Business NameJAMES K. YAN, D.O., MEDICAL OFFICE INC.
Location Address728 PACIFIC AVE, SUITE 305San Francisco, CA 94133-4457
Mailing Address728 Pacific Ave, Suite 305San Francisco, CA 94133-4457 · (415) 781-1818
Phone(415) 781-1818
Organization SubpartNo
Authorized OfficialJames K. YanPhysician/ceo · (415) 781-1818
Enumeration DateAugust 2, 2008
✔ NPI 1609032283 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians
Taxonomy Code207RG0100X
License✔ Licensed in CA · 20A6238
Definition
An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs.
728 PACIFIC AVE, San Francisco, CA 94133
Open in Google Maps ↗

Other Identifiers 1

Medicare UPING50111CA

Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

James K. Yan, D.o., Medical Office Inc. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 1 clinician reassigns Medicare billing to James K. Yan, D.O., Medical Office Inc., which bills Medicare for the services this clinician delivers.

Clinician (1)

James Yan, D.O.
Gastroenterology
NPI 1588683890
728 PACIFIC AVE STE 305
San Francisco, CA 94133
(415) 781-1818
✔ PECOS✔ Accepts MedicareSame address

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is James K. Yan, D.O., Medical Office Inc.'s NPI number?

The NPI number for James K. Yan, D.O., Medical Office Inc. is 1609032283. It was assigned to this organization in the NPPES registry on August 2, 2008.

Where is James K. Yan, D.O., Medical Office Inc. located?

James K. Yan, D.O., Medical Office Inc. is located at 728 Pacific Ave Suite 305, San Francisco, CA 94133. The listed phone number is (415) 781-1818.

What is James K. Yan, D.O., Medical Office Inc.'s specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Is James K. Yan, D.O., Medical Office Inc. enrolled in Medicare?

Yes. James K. Yan, D.O., Medical Office Inc. is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for James K. Yan, D.O., Medical Office Inc. was last updated on August 2, 2008. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.