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Internal Medicine Providers in West Islip, NY

Browse 23 Internal Medicine providers listed in NPPES with a practice address in West Islip, New York.

23 Healthcare Providers

How West Islip compares with the U.S.

West Islip has 86 clinicians in Internal Medicine per 100,000 residents, about 1.9 times the U.S. rate of 44.

That is 23 active clinicians in Internal Medicine with a practice address in West Islip, for a population of 26,865.

The New York rate is 61 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.

100% of clinicians in Internal Medicine in West Islip listed in the CMS Medicare file (13 of 13) accept Medicare assignment. That is higher than the New York share of 91%.

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.

23% of clinicians in Internal Medicine in West Islip listed in the CMS Medicare file (3 of 13) have a CMS telehealth indicator, meaning their recent Medicare claims include telehealth services. That is lower than the New York share of 35%.

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 West Islip, NY

Source: CMS PECOS
PECOS Enrolled Specialists 17 In West Islip, NY
Part B Lab & Imaging Eligible 17 Diagnostic Referrals
DME Ordering Eligible 17 Durable Medical Equipment
Home Health Agency Referrals 17 HHA Ordering Eligible
Showing 1โ€“20 of 23 providers
With recent CMS data first, then Aโ€“Z

Dr. Sumeet K Anand , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
1111 Montauk Hwy Ste 2-4, West Islip, NY 117954910
Phone: 6316479100
NPI Identifier 1902896764
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Dr. Christopher Michael Brennan , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
1000 Montauk Highway, Hospitalist Department 3rd Floor, West Islip, NY 11795
Phone: 6313763610
NPI Identifier 1174771323
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Dr. Eleni J Dilos , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
1000 Montauk Hwy, West Islip, NY 117954927
Phone: 6313764174
NPI Identifier 1992700116
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Dr. Michael Gewirtz , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
1000 Montauk Hwy, West Islip, NY 117954927
Phone: 6313763000
NPI Identifier 1093739534
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Dr. Anna Gorski-Piaszczyk , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
510 Montauk Hwy, Suite D, West Islip, NY 11795
Phone: 6315877474
NPI Identifier 1518044981
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Dr. Stuart Neil Greenberg , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
434 Sunrise Hwy, West Islip, NY 117952112
Phone: 6313761499
NPI Identifier 1043244130
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Dr. Abu Muhammad M Haque , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
1249 Montauk Hwy, West Islip, NY 117954916
Phone: 6319688990
NPI Identifier 1588658512
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Dr. Voichita Ionescu , MD

Internal Medicine

Active NPI Status
1000 Montauk Hwy, West Islip, NY 117954927
Phone: 6313764394
NPI Identifier 1265531917
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Dr. Fozia Jangda , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
1000 Montauk Hwy, West Islip, NY 117954927
Phone: 6313763000
NPI Identifier 1780921809
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Dr. Anser N Lone , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
1000 Montauk Hwy, West Islip, NY 117954927
Phone: 6313764174
NPI Identifier 1407851637
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Dr. Bernard Jay Nash , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
500 Montauk Hwy, Ste S, West Islip, NY 117954420
Phone: 6315877733
NPI Identifier 1831196187
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Bhargav Patel

Internal Medicine

Active NPI Status Accepts Medicare Assignment
1000 Montauk Hwy, West Islip, NY 117954927
Phone: 6313763535
NPI Identifier 1932599222
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Dr. Katherine Rowan , MD

Internal Medicine

Active NPI Status
631 Montauk Hwy Ste 1b, West Islip, NY 117954400
Phone: 6313064607
NPI Identifier 1205178969
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Dr. Swati Abhijit Salunke , MD

Internal Medicine

Active NPI Status
1000 Montauk Hwy, Good Samaritan Hospital, West Islip, NY 117954927
Phone: 6313763000
NPI Identifier 1265695324
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Dr. Jaishree Subramani , MD, MPH

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
500 M0ntauk Highway, Suite B, West Islip, NY 117951201
Phone: 6314224343
NPI Identifier 1063501104
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Dr. Lawrence H Womack , MD

Internal Medicine

Active NPI Status
400 Montauk Hwy, Suite #111, West Islip, NY 117954429
Phone: 6312770051
NPI Identifier 1487659629
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Dr. Mohammad Yazdanie , MD

Internal Medicine

Active NPI Status
1000 Montauk Hwy, West Islip, NY 117954927
Phone: 6313763000
NPI Identifier 1134142599
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Dr. Yonael Ayinalem , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
1000 Montauk Hwy, West Islip, NY 117954927
Phone: 6313763000
NPI Identifier 1932857901
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Dr. Thomas Hall , MD

Internal Medicine

Active NPI Status
1000 Montauk Hwy, West Islip, NY 117954927
Phone: 6313763000
NPI Identifier 1356365803
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Dr. Gabriel T Leonte , MD

Internal Medicine

Active NPI Status
1000 Montauk Hwy, West Islip, NY 117954927
Phone: 6313763000
NPI Identifier 1144225350
View Full Profile

Frequently Asked Questions about Internal Medicine in West Islip

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 New York 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.