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PENINSULA GASTROINTESTINAL
NPI 1306144209
Internal Medicine - Gastroenterology in San Mateo, CA

Active since March 02, 2011CLIA 05D2306662 · Certificate of Compliance
100 S ELLSWORTH AVE, SUITE 507, SAN MATEO, CA 94401(650) 342-7432(650) 342-3239 Get Directions Write a Review

NPPES record last updated: August 18, 2016. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Peninsula Gastrointestinal NPPES

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

PENINSULA GASTROINTESTINAL (NPI 1306144209) is a healthcare organization registered as a gastroenterology in San Mateo, California and active in the NPI registry since March 2011. The organization holds a CLIA Certificate of Compliance certificate valid through December 3, 2027 and lists Edward K Onuma, President, as its authorized official.

NPPES Registry Identity

NPI1306144209
Entity TypeOrganization
Primary Taxonomy207RG0100X
Legal Business NamePENINSULA GASTROINTESTINAL
Location Address100 S ELLSWORTH AVE, SUITE 507San Mateo, CA 94401-3939
Mailing Address100 S Ellsworth Ave, Suite 507San Mateo, CA 94401-3939 · (650) 342-7432
Phone(650) 342-7432
Fax(650) 342-3239
Organization SubpartNo
Authorized OfficialEdward K OnumaPresident · (650) 342-7432
Enumeration DateMarch 2, 2011
Last NPPES UpdateAugust 18, 2016
✔ NPI 1306144209 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians
Taxonomy Code207RG0100X
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.
100 S ELLSWORTH AVE, San Mateo, CA 94401
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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

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Medica.Insurance ›

CLIA Laboratory Certificates CMS CLIA

Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.

Certificate of Compliance 05D2306662

Peninsula Gastrointestinal Specialists Inc · San Mateo, CA
Active · expires Dec 3, 2027
CLIA Number05D2306662
Laboratory TypePhysician Office
Certificate Effective DateDecember 4, 2025
Certificate Expiration DateDecember 3, 2027
Laboratory DirectorJin Guo
Laboratory Phone(650) 342-7432
Laboratory LocationPeninsula Gastrointestinal Specialists Inc100 S Ellsworth Ave, Ste 507, San Mateo, CA 94401
CLIA data matches this NPI record on: Address Name Phone
This certificate is issued to a laboratory after an inspection that finds the laboratory to be in compliance with all applicable CLIA requirements.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MS. REBECCA LYN MARCULESCU AU.D.
Audiologist
100 S ELLSWORTH AVE, 303
SAN MATEO, CA 94401
San Mateo County (650) 579-4470
OKAI CHIROPRACTIC CORPORATION
Chiropractor
100 S ELLSWORTH AVE, STE 804
SAN MATEO, CA 94401
San Mateo County (650) 344-8743
DRS SHTURMAN AND KISILYUK INC
Dentist
100 S ELLSWORTH AVE, STE 809
SAN MATEO, CA 94401
San Mateo County (650) 343-4477
DR. JOHN E BRADSHAW
Psychologist
100 S ELLSWORTH AVE, #802
SAN MATEO, CA 94401
San Mateo County (650) 343-6955
REBECCA FORREST
Physician Assistant
100 S ELLSWORTH AVE, SUITE 806
SAN MATEO, CA 94401
San Mateo County (650) 401-6060
JULIA PRIEB CO
Orthotist
100 S ELLSWORTH AVE, SUITE 203
SAN MATEO, CA 94401
San Mateo County (650) 343-4504
SAN MATEO PSYCHOLOGICAL SERVICES
Health Maintenance Organization
100 S ELLSWORTH AVE, # 802
SAN MATEO, CA 94401
San Mateo County (650) 343-6955
KEVIN S FINNESEY MD A PROFESSIONAL CORPORATION
Orthopaedic Surgery (Orthopaedic Surgery of the Spine)
100 S ELLSWORTH AVE, SUITE 504
SAN MATEO, CA 94401
San Mateo County (650) 343-5633

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 Peninsula Gastrointestinal's NPI number?

The NPI number for Peninsula Gastrointestinal is 1306144209. It was assigned to this organization in the NPPES registry on March 2, 2011.

Where is Peninsula Gastrointestinal located?

Peninsula Gastrointestinal is located at 100 S Ellsworth Ave Suite 507, San Mateo, CA 94401. The listed phone number is (650) 342-7432.

What is Peninsula Gastrointestinal's specialty?

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

Does Peninsula Gastrointestinal hold a CLIA laboratory certificate?

Yes. A Certificate of Compliance (number 05D2306662) is associated with this NPI, valid through December 3, 2027. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

What insurance does Peninsula Gastrointestinal accept?

Health plans from Medica list Peninsula Gastrointestinal as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Peninsula Gastrointestinal was last updated on August 18, 2016. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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.