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PENINSULA GASTROENTEROLOGY MEDICAL GROUP INC
NPI 1558434589
Internal Medicine - Gastroenterology in Redwood City, CA

Active since November 16, 2006
2900 WHIPPLE AVE STE 245, REDWOOD CITY, CA 94062(650) 365-3700(650) 368-3836 Get Directions Write a Review

NPPES record last updated: March 2, 2010. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Peninsula Gastroenterology Medical Group Inc NPPES

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

PENINSULA GASTROENTEROLOGY MEDICAL GROUP INC (NPI 1558434589) is a healthcare organization registered as a gastroenterology in Redwood City, California and active in the NPI registry since November 2006. The organization lists James Torosis, Physician, as its authorized official.

NPPES Registry Identity

NPI1558434589
Entity TypeOrganization
Primary Taxonomy207RG0100X
Legal Business NamePENINSULA GASTROENTEROLOGY MEDICAL GROUP INC
Location Address2900 WHIPPLE AVE STE 245Redwood City, CA 94062-2851
Mailing Address2900 Whipple Ave Ste 245Redwood City, CA 94062-2851 · (650) 365-3700 · Fax (650) 368-3836
Phone(650) 365-3700
Fax(650) 368-3836
Organization SubpartNo
Authorized OfficialJames TorosisPhysician · (650) 365-3700
Enumeration DateNovember 16, 2006
Last NPPES UpdateMarch 2, 2010
✔ NPI 1558434589 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.
2900 WHIPPLE AVE STE 245, Redwood City, CA 94062
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Other Identifiers 3

MedicaidGR0025350CA
OtherZZZ12647ZCA · Blue Shield
Medicare ID-Type UnspecifiedZZZ12647ZCA

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)

Peninsula Gastroenterology Medical Group Inc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

5

Medicare enrollment records show 5 clinicians reassign Medicare billing to Peninsula Gastroenterology Medical Group Inc, which bills Medicare for the services they deliver. Of these, 3 practice at this address and 5 within 10 miles. They are listed nearest first.

Clinicians, nearest first (5)

Cynthia Leung, MD
Gastroenterology
NPI 1861570434
2900 WHIPPLE AVE SUITE 245
Redwood City, CA 94062
(650) 365-3700
✔ PECOS✔ Accepts MedicareSame address
James Torosis, M.D.
Gastroenterology
NPI 1851477467
2900 WHIPPLE AVE STE 245
Redwood City, CA 94062
(650) 365-3700
✔ PECOS✔ Accepts MedicareSame address
Vicky Yang, M.D.
Gastroenterology
NPI 1710063334
2900 WHIPPLE AVE STE 245
Redwood City, CA 94062
(650) 365-3700
✔ PECOS✔ Accepts MedicareSame address
Daniel Rengstorff, M.D.
Gastroenterology
NPI 1033295662
218 DE ANZA BLVD
San Mateo, CA 94402
(650) 341-9131
✔ PECOS✔ Accepts Medicare5.3 mi
Ann Chen, MD
Gastroenterology
NPI 1003840307
300 PASTEUR DR A149, MC5202
Stanford, CA 94305
(650) 725-3376
✔ PECOS✔ Accepts Medicare5.5 mi

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 Peninsula Gastroenterology Medical Group Inc's NPI number?

The NPI number for Peninsula Gastroenterology Medical Group Inc is 1558434589. It was assigned to this organization in the NPPES registry on November 16, 2006.

Where is Peninsula Gastroenterology Medical Group Inc located?

Peninsula Gastroenterology Medical Group Inc is located at 2900 Whipple Ave Ste 245, Redwood City, CA 94062. The listed phone number is (650) 365-3700.

What is Peninsula Gastroenterology Medical Group Inc's specialty?

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

Is Peninsula Gastroenterology Medical Group Inc enrolled in Medicare?

Yes. Peninsula Gastroenterology Medical Group Inc is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Peninsula Gastroenterology Medical Group Inc?

According to the CMS Revalidation Reassignment List (October 2026 release), 5 clinicians, all in Gastroenterology, reassign their Medicare billing to Peninsula Gastroenterology Medical Group Inc. A reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for the clinician's services. Of these, 3 practice at this address and 5 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for Peninsula Gastroenterology Medical Group Inc was last updated on March 2, 2010. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 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.