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GMS
NPI 1790085983
Internal Medicine in Stamford, CT

Active since October 22, 2010
66 GLENBROOK RD, STE 400, STAMFORD, CT 06902(203) 961-8241 Get Directions Write a Review

NPPES record last updated: November 19, 2010. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Gms NPPES

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

GMS (NPI 1790085983) is a healthcare organization registered as an internal medicine in Stamford, Connecticut and active in the NPI registry since October 2010. The organization lists Anna Shender, President, as its authorized official.

NPPES Registry Identity

NPI1790085983
Entity TypeOrganization
Primary Taxonomy207R00000X
Legal Business NameGREENWICH MEDICAL SERVICES PC
Location Address66 GLENBROOK RD, STE 400Stamford, CT 06902-8402
Mailing Address66 Glenbrook Rd, Ste 400Stamford, CT 06902-8402
Phone(203) 961-8241
Organization SubpartNo
Authorized OfficialAnna ShenderPresident · (203) 961-8241
Enumeration DateOctober 22, 2010
Last NPPES UpdateNovember 19, 2010
✔ NPI 1790085983 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in CT · 000498
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
66 GLENBROOK RD, Stamford, CT 06902
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Other Names 1

Doing Business AsGms

Other Identifiers 1

Medicare PIN110007699CT

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)

Gms 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 Gms, which bills Medicare for the services this clinician delivers.

Clinician (1)

Anna Shender, M.D., D.O.
Internal Medicine
NPI 1083794812
66 GLENBROOK RD STE 400
Stamford, CT 06902
(203) 961-8241
✔ 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 Greenwich Medical Services PC's NPI number?

The NPI number for Greenwich Medical Services PC is 1790085983. It was assigned to this organization in the NPPES registry on October 22, 2010. The provider is doing business as Gms.

Where is Greenwich Medical Services PC located?

Greenwich Medical Services PC is located at 66 Glenbrook Rd Ste 400, Stamford, CT 06902. The listed phone number is (203) 961-8241.

What is Greenwich Medical Services PC's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Greenwich Medical Services PC enrolled in Medicare?

Yes. Greenwich Medical Services PC is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Greenwich Medical Services PC?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Internal Medicine) reassigns their Medicare billing to Greenwich Medical Services PC. 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. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for Greenwich Medical Services PC was last updated on November 19, 2010. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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.