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GREATER BOSTON GASTROENTEROLOGY
NPI 1164498796
Internal Medicine - Gastroenterology in Framingham, MA

Active since February 24, 2006CLIA 22D0978112 · Accreditation
475 FRANKLIN ST, SUITE 110, FRAMINGHAM, MA 01702(508) 620-9200(508) 620-6483 Get Directions Write a Review

NPPES record last updated: May 15, 2025. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Greater Boston Gastroenterology NPPES

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

GREATER BOSTON GASTROENTEROLOGY (NPI 1164498796) is a healthcare organization registered as a gastroenterology in Framingham, Massachusetts and active in the NPI registry since February 2006. The organization holds an CLIA Accreditation certificate valid through January 28, 2027 and lists Alan Oliver, Ceo, as its authorized official.

NPPES Registry Identity

NPI1164498796
Entity TypeOrganization
Primary Taxonomy207RG0100X
Legal Business NameGREATER BOSTON GASTROENTEROLOGY
Location Address475 FRANKLIN ST, SUITE 110Framingham, MA 01702-6264
Mailing Address475 Franklin St, Suite 110Framingham, MA 01702-6264 · (508) 620-9200 · Fax (508) 620-6483
Phone(508) 620-9200
Fax(508) 620-6483
Organization SubpartNo
Authorized OfficialAlan OliverCeo · (786) 530-3820
Enumeration DateFebruary 24, 2006
Last NPPES UpdateMay 15, 2025
NPPES CertifiedMay 15, 2025
✔ NPI 1164498796 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.
475 FRANKLIN ST, Framingham, MA 01702
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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

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Greater Boston Gastroenterology is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

37

Medicare enrollment records show 37 clinicians reassign Medicare billing to Greater Boston Gastroenterology, which bills Medicare for the services they deliver. Of these, 10 practice at this address and 21 within 10 miles. Listed here are the 20 practicing nearest to this location.

Clinicians by Medicare Specialty 6

Gastroenterology12
Nurse Practitioner9
Diagnostic Radiology8
Pathology6
Interventional Radiology1
Registered Dietitian or Nutrition Professional1

Nearest to this location (20)

See all 37
Samantha Falkowski
Nurse Practitioner
NPI 1659942902
475 FRANKLIN ST STE 110
Framingham, MA 01702
(508) 620-9200
✔ PECOS✔ Accepts MedicareSame address
Lynne Ahn, MD
Gastroenterology
NPI 1144269143
475 FRANKLIN ST STE 110
Framingham, MA 01702
(508) 620-9200
✔ PECOS✔ Accepts MedicareSame address
George Dickstein, M.D.
Gastroenterology
NPI 1720054356
475 FRANKLIN ST SUITE 110
Framingham, MA 01702
(508) 620-9200
✔ PECOS✔ Accepts MedicareSame address
Steven Fine, M.D.
Gastroenterology
NPI 1164498457
475 FRANKLIN ST SUITE 110
Framingham, MA 01702
(508) 620-9200
✔ PECOS✔ Accepts MedicareSame address
Anna Malouf, NP
Nurse Practitioner
NPI 1699115865
475 FRANKLIN ST SUITE 110
Framingham, MA 01702
(508) 620-9200
✔ PECOS✔ Accepts MedicareSame address
Andres Mogollon, M.D.
Gastroenterology
NPI 1659595429
475 FRANKLIN ST SUITE 110
Framingham, MA 01702
(508) 620-9200
✔ PECOS✔ Accepts MedicareSame address
Samantha Newman, NP
Nurse Practitioner
NPI 1710601851
475 FRANKLIN ST STE 110
Framingham, MA 01702
(508) 620-9200
✔ PECOSSame address
Jaime Oviedo, M.D.
Gastroenterology
NPI 1164409421
475 FRANKLIN STREET SUITE 110
Framingham, MA 01702
(508) 620-9200
✔ PECOS✔ Accepts MedicareSame address
Heidi Peters, N.P.
Nurse Practitioner
NPI 1326014614
475 FRANKLIN ST SUITE 110
Framingham, MA 01702
(508) 620-9200
✔ PECOSSame address
Greta Taitelbaum, MD CM FRCP(C) FACG
Gastroenterology
NPI 1649246273
475 FRANKLIN ST SUITE 110
Framingham, MA 01702
(508) 620-9200
✔ PECOS✔ Accepts MedicareSame address
Erica Gupta, M.D.
Diagnostic Radiology
NPI 1508029026
571 UNION AVE STE 102
Framingham, MA 01702
(508) 848-2164
✔ PECOS0.4 mi
Anatoly Sukharsky, M.D.
Diagnostic Radiology
NPI 1518093194
571 UNION AVE STE 102
Framingham, MA 01702
(508) 848-2164
✔ PECOS0.4 mi
Michelle Swire, M.D.
Diagnostic Radiology
NPI 1417915471
571 UNION AVE STE 102
Framingham, MA 01702
(508) 848-2164
✔ PECOS0.4 mi
Amogh Srivastava, MD
Diagnostic Radiology
NPI 1386873008
115 LINCOLN ST
Framingham, MA 01702
(508) 383-1300
✔ PECOS✔ Accepts Medicare0.6 mi
Saint George Aufranc, MD
Pathology
NPI 1740244516
115 LINCOLN ST METROWEST MEDICAL CENTER
Framingham, MA 01702
(508) 383-1091
✔ PECOS✔ Accepts Medicare0.6 mi
Justin Hilson, MD
Pathology
NPI 1609035880
115 LINCOLN ST DEPARTMENT OF PATHOLOGY
Framingham, MA 01702
(508) 383-1090
✔ PECOS✔ Accepts Medicare0.6 mi
Robert Najarian, M.D.
Pathology
NPI 1033367966
115 LINCOLN ST
Framingham, MA 01702
(508) 580-1670
✔ PECOS✔ Accepts Medicare0.6 mi
Christianna Moran, RD
Registered Dietitian or Nutrition Professional
NPI 1407125537
185 COMMONWEALTH RD
Wayland, MA 01778
(508) 561-5920
3.9 mi
Xunli Wang
Nurse Practitioner
NPI 1932026382
1 CONSTITUTION DR
Southborough, MA 01772
(402) 906-4828
✔ PECOS4.3 mi
Christine Abraham, NP
Nurse Practitioner
NPI 1215774658
24 NEWTON ST
Southborough, MA 01772
(508) 460-3250
✔ PECOS✔ Accepts Medicare5.2 mi
See all 37 clinicians

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

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 Accreditation 22D0978112

Greater Boston Gastroenterology, LLC · Framingham, MA
Active · expires Jan 28, 2027
CLIA Number22D0978112
Laboratory TypePhysician Office
Certificate Effective DateJanuary 29, 2025
Certificate Expiration DateJanuary 28, 2027
Laboratory DirectorDr. Robert M. Najarian
Laboratory Phone(508) 620-9200
Laboratory LocationGreater Boston Gastroenterology, LLC475 Franklin Street Suite 110, Framingham, MA 01702
CLIA data matches this NPI record on: Address Name Phone
This is a certificate that is issued to a laboratory on the basis of the laboratory's accreditation by an accreditation organization approved by CMS.

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 Greater Boston Gastroenterology's NPI number?

The NPI number for Greater Boston Gastroenterology is 1164498796. It was assigned to this organization in the NPPES registry on February 24, 2006.

Where is Greater Boston Gastroenterology located?

Greater Boston Gastroenterology is located at 475 Franklin St Suite 110, Framingham, MA 01702. The listed phone number is (508) 620-9200.

What is Greater Boston Gastroenterology's specialty?

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

Is Greater Boston Gastroenterology enrolled in Medicare?

Yes. Greater Boston Gastroenterology is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Greater Boston Gastroenterology?

According to the CMS Revalidation Reassignment List (October 2026 release), 37 clinicians in 6 Medicare specialties reassign their Medicare billing to Greater Boston Gastroenterology. 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. The largest specialties are Gastroenterology (12), Nurse Practitioner (9) and Diagnostic Radiology (8). Of these, 10 practice at this address and 21 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Does Greater Boston Gastroenterology hold a CLIA laboratory certificate?

Yes. A Certificate of Accreditation (number 22D0978112) is associated with this NPI, valid through January 28, 2027. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

When was this NPI record last updated?

The NPPES record for Greater Boston Gastroenterology was last updated on May 15, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 months 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.