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Internal Medicine - Gastroenterology Specialists in Boston, MA

Browse 280 Internal Medicine - Gastroenterology providers listed in NPPES with a practice address in Boston, Massachusetts.

280 Healthcare Providers

How Boston compares with the U.S.

Boston has 42 clinicians in Internal Medicine - Gastroenterology per 100,000 residents, 6.8 times the U.S. rate of 6.2.

That is 280 active clinicians in Internal Medicine - Gastroenterology with a practice address in Boston, for a population of 666,442.

The Massachusetts rate is 9.7 per 100,000 residents.

What these numbers mean

Clinicians per 100,000 residents compares places of different sizes. We count active clinicians who list a practice address in the area in the federal NPI registry (NPPES) and divide by the number of people who live there, according to the U.S. Census Bureau. The U.S. rate is the same calculation for the whole country.

A higher number does not mean it is easier to get an appointment, that wait times are shorter, or that care is better. It also does not show how many clinicians are accepting new patients or which insurance plans they take. A lower number does not by itself mean there is a shortage.

City counts use the city name in each clinician's practice address. That postal city can cover a larger or smaller area than the city limits the Census Bureau uses for population, and many clinicians list only one address even if they work in several places. Cities with hospitals or large medical centers often list more specialists than the number of residents alone would suggest, because patients also come from nearby areas.

99% of clinicians in Internal Medicine - Gastroenterology in Boston listed in the CMS Medicare file (196 of 197) accept Medicare assignment. That is similar to the Massachusetts share of 97%.

What is Medicare assignment?

A clinician who accepts Medicare assignment agrees to take the Medicare-approved amount as full payment for services that Original Medicare covers. You usually still pay your deductible and coinsurance. This comes from the CMS Doctors and Clinicians file and applies to Original Medicare only. Medicare Advantage plans have their own provider networks. It does not show whether a clinician is taking new patients.

Some clinicians are listed as "may accept assignment," which means they can decide case by case. Clinicians without an assignment flag, or who are not in the CMS file, are not counted as accepting assignment. That does not mean they refuse Medicare. Ask the office before your visit.

76% of clinicians in Internal Medicine - Gastroenterology in Boston listed in the CMS Medicare file (149 of 197) have a CMS telehealth indicator, meaning their recent Medicare claims include telehealth services. That is higher than the Massachusetts share of 65%.

About the telehealth indicator

The telehealth indicator comes from CMS. It marks clinicians whose recent paid Medicare claims include services delivered by telehealth. It means a clinician has provided some services by telehealth, not that every visit can be done online. A clinician without the indicator may still offer telehealth, for example to patients who are not on Medicare. Ask the office which visits can be done by video or phone.

These figures summarize public federal data. They do not measure quality of care, appointment availability, or whether a clinician accepts your insurance or new patients. Registry addresses can be out of date. Please confirm details directly with the office and your plan. This information is not medical advice.

Prepared by T-MedInfo from NPPES, CMS and U.S. Census Bureau data. Questions or corrections: support@true-medinfo.com ยท Methodology

Sources: Clinician counts and practice addresses: NPPES NPI Registry, Centers for Medicare & Medicaid Services (CMS), data as of August 2026. Medicare assignment and telehealth indicators: CMS Doctors and Clinicians National Downloadable File. Population: U.S. Census Bureau, American Community Survey 2020-2024 5-Year Estimates, Table B01003 (Total Population).

Internal Medicine - Gastroenterology Medicare (PECOS) Enrollment & Ordering Eligibility

Medicare enrollment and order/referring eligibility listed by CMS for Internal Medicine - Gastroenterology practitioners in Boston, MA

Source: CMS PECOS
PECOS Enrolled Specialists 216 In Boston, MA
Part B Lab & Imaging Eligible 214 Diagnostic Referrals
DME Ordering Eligible 224 Durable Medical Equipment
Home Health Agency Referrals 214 HHA Ordering Eligible
Showing 1โ€“20 of 280 providers
With recent CMS data first, then Aโ€“Z

Dr. Diane Renee Abraczinskas , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment
55 Fruit St, Blk 4 Gastroenterology Associates, Boston, MA 021142621
Phone: 6177246044
NPI Identifier 1811988488
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Dr. Hiroyuki Aihara , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment
75 Francis St, Boston, MA 021156110
Phone: 6177325500
NPI Identifier 1619395795
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Dr. Jessica R Allegretti , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
75 Francis Street, Brigham And Women's Hospital, Boston, MA 02115
Phone: 6177326389
NPI Identifier 1992932453
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Dr. Harmony V Allison , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
800 Washington St, #233, Boston, MA 021111552
Phone: 6176365883
NPI Identifier 1245240704
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Mohammad Almeqdadi

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
800 Washington St, Boston, MA 021111552
Phone: 6176365000
NPI Identifier 1114378387
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Dr. Ashwin N Ananthakrishnan , MD, MPH

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
165 Cambridge St 9th Fl, Boston, MA 02114
Phone: 6177260267
NPI Identifier 1033292545
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Dr. Harry T Anastopoulos , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
110 Francis St Suite 8e, Boston, MA 02215
Phone: 6176328623
NPI Identifier 1043306558
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Dr. Karin L Andersson , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
55 Fruit St, Massachusetts General Hospital Grj 722, Boston, MA 021142621
Phone: 6177246113
NPI Identifier 1972585511
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Adjoa Anyane-Yeboa

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
15 Parkman Street, Wang 5, Boston, MA 021143117
Phone: 9148063243
NPI Identifier 1851666978
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Dr. Michael D Apstein , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment
110 Francis St, Suite 8e, Boston, MA 022155501
Phone: 6176328289
NPI Identifier 1609854603
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Dr. Uri Avissar , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment
725 Albany St # 6b, Boston, MA 021183549
Phone: 6176386525
NPI Identifier 1134296064
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Dr. Peter Alan Banks , MD

Internal Medicine - Gastroenterology

Active NPI Status
75 Francis Street, Brigham And Women's Hospital Division Of Gastroenterolo, Boston, MA 02115
Phone: 6177326389
NPI Identifier 1235188251
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Dr. Nir Mordechai Bar , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
55 Fruit St, Boston, MA 021142621
Phone: 6177260270
NPI Identifier 1588330658
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Dr. Fateh Bazerbachi , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment
55 Fruit St, Boston, MA 021142696
Phone: 6177247168
NPI Identifier 1316208473
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Dr. Tyler M Berzin , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
330 Brookline Ave, Beth Israel Deaconess Medical Center- Harvard Medical, Boston, MA 022155400
Phone: 6176672136
NPI Identifier 1376597641
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Dr. Emily Dana Bethea , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
55 Fruit Street, Mgh Gi Associates, Boston, MA 021142696
Phone: 6177263313
NPI Identifier 1972898021
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Dr. Irun Bhan , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
55 Fruit St, Boston, MA 021142696
Phone: 6177263316
NPI Identifier 1376860833
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Dr. Charles M. Bliss , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment
830 Harrison Avenue, Moakley, 2nd Floor, Boston, MA 021182905
Phone: 6176386525
NPI Identifier 1740266477
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Charlotte Dorothy Marie Blumrosen

Internal Medicine - Gastroenterology

Active NPI Status
800 Washington St, Boston, MA 021111552
Phone: 6176365000
NPI Identifier 1184366825
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Dr. Iman Jonee Boston , MD

Internal Medicine - Gastroenterology

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
330 Brookline Avenue, Department Of Gastroenterology, Boston, MA 02215
Phone: 6177548888
NPI Identifier 1750744173
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Frequently Asked Questions about Internal Medicine - Gastroenterology in Boston

How do I check a Internal Medicine - Gastroenterology practitioner's license?

Each practitioner profile shows the NUCC taxonomy code and any state license number the practitioner reported to NPPES, plus a link to the Massachusetts licensing board lookup. NPPES entries are self-reported; current license status is published only by the state board.

Why is a practitioner missing from this list?

This list shows NPI records that are active in NPPES. A deactivated NPI keeps its profile with the deactivation date and practice history; find it with the site search by name or NPI number.