NPPES file of Aug 9, 2026

Peninsula Gastrointestinal in San Mateo, CA

This organization bills under NPI 1306144209, an organization record issued on Mar 2, 2011 with the primary taxonomy Gastroenterology Physician. Each clinician who works there has their own NPI and license.

CMS NPPES registry, file of Aug 9, 2026 · method · Verify with CMS →

Organization recordNPPES, Aug 2026
1306144209
Legal name
Peninsula Gastrointestinal
Entity
Type 2 · organization
Primary taxonomy
Gastroenterology Physician 207RG0100X
Practice location
100 S ELLSWORTH AVE SUITE 507, San Mateo, CA 94401
Phone
650-342-7432
Enumerated
Mar 2, 2011
Record updated
Aug 18, 2016
Authorized official
President (title as filed)
Public record from the NPPES NPI Registry (open it on CMS). An NPI identifies who bills; it is not a facility license.

3 clinicians CMS lists with Peninsula Gastrointestinal in San Mateo

  1. Jin Guo, MDAnatomic Pathology & Clinical Pathology Physician1538375217
  2. Eugene Lee, MDSpecialist1023049590
  3. Edward Onuma, MD,PHDSpecialist1477559722

Source: CMS Doctors and Clinicians group affiliations, matched by practice name and city.

Checking an organization

  1. Confirm the business with the California secretary of state.
  2. Check the HHS-OIG exclusion list for the organization.
  3. Verify each clinician on their own record and the state license search.

Common questions

Is an organization NPI a license?

No. An NPI identifies who bills. Facilities and the clinicians who work there are licensed separately by the state.

Source: CMS National Plan and Provider Enumeration System (NPPES), monthly file of Aug 9, 2026 (NPPES files on CMS.gov). An NPI identifies who bills; it is not a license.