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Internal Medicine Providers in Lexington, MA

Browse 36 Internal Medicine providers listed in NPPES with a practice address in Lexington, Massachusetts.

36 Healthcare Providers

How Lexington compares with the U.S.

Lexington has 105 clinicians in Internal Medicine per 100,000 residents, 2.4 times the U.S. rate of 44.

That is 36 active clinicians in Internal Medicine with a practice address in Lexington, for a population of 34,295.

That is close to the Massachusetts rate of 97.

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.

93% of clinicians in Internal Medicine in Lexington listed in the CMS Medicare file (14 of 15) accept Medicare assignment. That is similar to the Massachusetts share of 96%.

Only 15 of 36 active clinicians in Internal Medicine in Lexington appear in the CMS Medicare file, so this share describes that smaller group.

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.

87% of clinicians in Internal Medicine in Lexington listed in the CMS Medicare file (13 of 15) have a CMS telehealth indicator, meaning their recent Medicare claims include telehealth services. That is higher than the Massachusetts share of 48%.

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 Medicare (PECOS) Enrollment & Ordering Eligibility

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

Source: CMS PECOS
PECOS Enrolled Specialists 16 In Lexington, MA
Part B Lab & Imaging Eligible 16 Diagnostic Referrals
DME Ordering Eligible 17 Durable Medical Equipment
Home Health Agency Referrals 16 HHA Ordering Eligible
Showing 1โ€“20 of 36 providers
With recent CMS data first, then Aโ€“Z

Dr. Steven P Abreu , MD

Internal Medicine

Active NPI Status
16 Hayden Avenue, Lahey Health Primary Care, Lexington, Lexington, MA 024217929
Phone: 7813727100
NPI Identifier 1790758266
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Dr. Wayne D. Brown , MD, MSC, MPH

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
35 Bedford St, 18a Lexington Med Management, Lexington, MA 024204320
Phone: 7818638080
NPI Identifier 1831136555
View Full Profile

Dr. Gail Ruth Corson , MD

Internal Medicine

Active NPI Status
10 Harbell St, Lexington, MA 024216612
Phone: 7816761969
NPI Identifier 1750314563
View Full Profile

Heidi Ray Doreau , NP

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
450 Bedford Street, Lexington, MA 02420
Phone: 7812746274
NPI Identifier 1053591644
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Dr. Daniel Frank Erler , MD MPH

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
16 Hayden Ave, Lahey Lexington, Lexington, MA 024217929
Phone: 7813727179
NPI Identifier 1598716862
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Dr. Eleanor R Gilbert , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
24 Blake Rd, Lexington, MA 024203202
Phone: 8882494575
NPI Identifier 1245463512
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Dr. Lisa W Gilbert , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
482 Bedford St, Lexington, MA 024201402
Phone: 7815282440
NPI Identifier 1962517920
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Dr. Sunita K Hanjura , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
450 Bedford Street, Lexington, MA 02420
Phone: 7812746274
NPI Identifier 1891727327
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Margot Grace Hartunian

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
24 Hartwell Ave Ste 204, Lexington, MA 024213132
Phone: 7818623800
NPI Identifier 1154312791
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Dr. David V Ives , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
482 Bedford St, Lexington, MA 024201402
Phone: 7815282440
NPI Identifier 1457399453
View Full Profile

Dr. Risa J Korn , MD

Internal Medicine

Active NPI Status
482 Bedford Street, Lexington, MA 02420
Phone: 7815282440
NPI Identifier 1205873403
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Dr. Alice S Lee , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
16 Hayden Ave, Lexington, MA 024217929
Phone: 6177893000
NPI Identifier 1841672300
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Dr. Emily Catherine Mcphillips , MD

Internal Medicine

Active NPI Status
482 Bedford Street, Lexington, MA 02420
Phone: 7815282440
NPI Identifier 1487692612
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Dr. Andrew O Nichols , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
57 Bedford St, Ste 130, Lexington, MA 024204500
Phone: 7818627500
NPI Identifier 1598762858
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Niravkumar Patel

Internal Medicine

Active NPI Status
4 Hadley Rd, Lexington, MA 02420
Phone: 6178939901
NPI Identifier 1710387915
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Dr. Hong Qian , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
57 Bedford St, Ste 130, Lexington, MA 024204500
Phone: 7818627500
NPI Identifier 1093715336
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Dr. Elizabeth Rosen , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
24 Hartwell Ave Ste 204, Lexington, MA 024213132
Phone: 7818623800
NPI Identifier 1073049797
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Dr. Christine E. Winger , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
16 Hayden Ave, Lahey Lexington, Lexington, MA 024217929
Phone: 7813727100
NPI Identifier 1073616868
View Full Profile

Dr. Peter J Zuromskis , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
482 Bedford St, Lexington, MA 024201402
Phone: 7816722250
NPI Identifier 1306935978
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Dr. Zaim J Badra , MD

Internal Medicine

Active NPI Status
5 Brent Rd, Lexington, MA 024201823
Phone: 7818624580
NPI Identifier 1093762726
View Full Profile

Frequently Asked Questions about Internal Medicine in Lexington

How do I check a Internal Medicine 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.

Other Specialties in Lexington

Internal Medicine Providers in Other Massachusetts Cities

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