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Internal Medicine Providers in Watertown, MA

Browse 28 Internal Medicine providers listed in NPPES with a practice address in Watertown, Massachusetts.

28 Healthcare Providers

How Watertown compares with the U.S.

Watertown has 79 clinicians in Internal Medicine per 100,000 residents, about 1.8 times the U.S. rate of 44.

That is 28 active clinicians in Internal Medicine with a practice address in Watertown, for a population of 35,543.

The Massachusetts rate is 97 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.

93% of clinicians in Internal Medicine in Watertown listed in the CMS Medicare file (13 of 14) accept Medicare assignment. That is similar to the Massachusetts share of 96%.

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.

86% of clinicians in Internal Medicine in Watertown listed in the CMS Medicare file (12 of 14) 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 Watertown, MA

Source: CMS PECOS
PECOS Enrolled Specialists 18 In Watertown, MA
Part B Lab & Imaging Eligible 18 Diagnostic Referrals
DME Ordering Eligible 18 Durable Medical Equipment
Home Health Agency Referrals 18 HHA Ordering Eligible
Showing 1โ€“20 of 28 providers
With recent CMS data first, then Aโ€“Z

Dr. Ehsan Azimi , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
485 Arsenal St, Watertown, MA 024725091
Phone: 6179725512
NPI Identifier 1437475829
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Dr. David J Cancian , MD

Internal Medicine

Active NPI Status
480 Pleasant St # A300, Watertown, MA 024722463
Phone: 6179269000
NPI Identifier 1962496539
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Dr. Andrew Cutler , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
521 Mount Auburn St, Ste 202, Watertown, MA 024724191
Phone: 6179269000
NPI Identifier 1437159720
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Dr. Hoang-Oanh Thi Doan , DO

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
63 Pleasant St, Watertown, MA 024722386
Phone: 6179246484
NPI Identifier 1760843619
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Dr. Jeffrey O Greenberg , MD

Internal Medicine

Active NPI Status
101 Walnut St, Watertown, MA 024724054
Phone: 7812913042
NPI Identifier 1134153885
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Dr. Paul L. Kasuba , MD

Internal Medicine

Active NPI Status
63 Pleasant St, Watertown, MA 024722386
Phone: 6179246484
NPI Identifier 1851389969
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Dr. Robert P Kelleher , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
521 Mount Auburn St, Ste 202, Watertown, MA 024724191
Phone: 6179269000
NPI Identifier 1891761714
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Dr. Joo Y Kim , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
485 Arsenal St, Internal Medicine, Watertown, MA 024725091
Phone: 6179725200
NPI Identifier 1497724173
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Dr. Hui-Shien Loh , MD

Internal Medicine

Active NPI Status
38 Pequossette St, Watertown, MA 024722763
Phone: 6175079166
NPI Identifier 1619937117
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Pooja Mehta

Internal Medicine

Active NPI Status Telehealth Services Available
1 Mount Auburn St, Watertown, MA 024723981
Phone: 7815280583
NPI Identifier 1700346822
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Dr. Subbuluxmi Natarajan , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
485 Arsenal St, Watertown, MA 024725091
Phone: 6179725100
NPI Identifier 1063599686
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Damaris Nou

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
485 Arsenal St, Watertown, MA 024725091
Phone: 6179725230
NPI Identifier 1275770042
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Dr. Rabiah Rafique , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
521 Mount Auburn St, Watertown, MA 024724191
Phone: 6177448542
NPI Identifier 1396009775
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Dr. May Riad , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
1 Mount Auburn St, Watertown, MA 024723923
Phone: 7816530100
NPI Identifier 1710355706
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Dr. Jahansouz Shokri , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
485 Arsenal St, Internal Medicine, Watertown, MA 024725091
Phone: 6179725240
NPI Identifier 1710980230
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Dr. Barbara Spivak , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
480 Pleasant St Ste A300, Watertown, MA 024722463
Phone: 6179269000
NPI Identifier 1952301251
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Dr. Audrey Susan Wagner , MD

Internal Medicine

Active NPI Status
485 Arsenal St, Internal Medicine, Watertown, MA 024725091
Phone: 6179725200
NPI Identifier 1639127152
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Dr. Heather Wolf , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
485 Arsenal St, Internal Medicine B, Watertown, MA 024725091
Phone: 6179725240
NPI Identifier 1841259595
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Dr. Alberto Yu-Wong , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
63 Pleasant Street, Watertown, MA 02472
Phone: 6179246484
NPI Identifier 1952396624
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Dr. Nisha Ann Basu , MD

Internal Medicine

Active NPI Status
101 Walnut St, Watertown, MA 024724054
Phone: 8888971887
NPI Identifier 1790723310
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Frequently Asked Questions about Internal Medicine in Watertown

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.