Independent US Healthcare Provider Directory & Public Medical Database Patient Guides
Medical Specialty Listing

Internal Medicine Providers in Greenwich, CT

Browse 54 Internal Medicine providers listed in NPPES with a practice address in Greenwich, Connecticut.

54 Healthcare Providers

How Greenwich compares with the U.S.

Greenwich has 365 clinicians in Internal Medicine per 100,000 residents, 8.2 times the U.S. rate of 44.

That is 54 active clinicians in Internal Medicine with a practice address in Greenwich, for a population of 14,792.

The Connecticut rate is 72 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.

80% of clinicians in Internal Medicine in Greenwich listed in the CMS Medicare file (20 of 25) accept Medicare assignment. That is lower than the Connecticut share of 94%.

Only 25 of 54 active clinicians in Internal Medicine in Greenwich 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.

40% of clinicians in Internal Medicine in Greenwich listed in the CMS Medicare file (10 of 25) have a CMS telehealth indicator, meaning their recent Medicare claims include telehealth services. That is higher than the Connecticut share of 34%.

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 Greenwich, CT

Source: CMS PECOS
PECOS Enrolled Specialists 33 In Greenwich, CT
Part B Lab & Imaging Eligible 41 Diagnostic Referrals
DME Ordering Eligible 41 Durable Medical Equipment
Home Health Agency Referrals 41 HHA Ordering Eligible
Showing 1โ€“20 of 54 providers
With recent CMS data first, then Aโ€“Z

Dr. Anthony A Alleva , MD

Internal Medicine

Active NPI Status
75 Holly Hill Ln, Greenwich, CT 068306098
Phone: 2038696960
NPI Identifier 1518938778
View Full Profile

Dr. Joseph Francis Andrews , MD

Internal Medicine

Active NPI Status
5 Perryridge Rd, Greenwich, CT 068304608
Phone: 2038634623
NPI Identifier 1740280411
View Full Profile

Dr. Herbert Michael Archer , MD

Internal Medicine

Active NPI Status
644 W Putnam Ave Ste 203, Greenwich, CT 068306088
Phone: 2036612596
NPI Identifier 1205028560
View Full Profile

Dr. James A Brunetti , DO

Internal Medicine

Active NPI Status
49 Lake Ave Ste 206, Greenwich, CT 06830
Phone: 2039001090
NPI Identifier 1578619797
View Full Profile

Dr. Rupal Dilip Chhabra , DO

Internal Medicine

Active NPI Status
500 W Putnam Ave Ste 435, Greenwich, CT 068306000
Phone: 4753358692
NPI Identifier 1912132796
View Full Profile

Dr. Allen L Chodock , MD

Internal Medicine

Active NPI Status
124 Ritch Ave W # Aptb304, Greenwich, CT 068306956
Phone: 2036812610
NPI Identifier 1811928138
View Full Profile

Dr. John Delvecchio , MD

Internal Medicine

Active NPI Status
75 Holly Hill Ln, Level C, Greenwich, CT 068306098
Phone: 2038633400
NPI Identifier 1619990868
View Full Profile

Dr. Christopher Matthew Edelmann , MD

Internal Medicine

Active NPI Status
42 Sherwood Pl, Greenwich, CT 06830
Phone: 2038690502
NPI Identifier 1902956121
View Full Profile

Kasandra Erazo

Internal Medicine

Active NPI Status Accepts Medicare Assignment
5 Perryridge Rd, Greenwich, CT 068304608
Phone: 2038633409
NPI Identifier 1629607817
View Full Profile

Dr. Sarah Mildred Gamble , DO

Internal Medicine

Active NPI Status Accepts Medicare Assignment
15 Valley Dr, Greenwich, CT 068315205
Phone: 2038692800
NPI Identifier 1265649073
View Full Profile

Dr. Sharon Gannot , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
644 W Putnam Ave, Greenwich, CT 068306088
Phone: 2032102820
NPI Identifier 1295077600
View Full Profile

Dr. Yves Anthony Gauvin , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
75 Holly Hill Ln Ste 201, Greenwich, CT 068302912
Phone: 2038696960
NPI Identifier 1861524829
View Full Profile

Dr. Steven J Glasser , MD

Internal Medicine

Active NPI Status
73 North Water Street, Greenwich, CT 068305815
Phone: 2035319354
NPI Identifier 1477611101
View Full Profile

Dr. Danielle E. Greenman , MD

Internal Medicine

Active NPI Status
75 Holly Hill Ln, Greenwich, CT 068306098
Phone: 2036612596
NPI Identifier 1487099404
View Full Profile

Dr. Khalil Ian Hussein , MD

Internal Medicine

Active NPI Status
5 Perryridge Rd, Greenwich, CT 068304608
Phone: 2038633408
NPI Identifier 1427442409
View Full Profile

Dr. Rashma Jhunja , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment Telehealth Services Available
75 Holly Hill Ln Ste 201, Greenwich, CT 068302912
Phone: 2038696960
NPI Identifier 1417052382
View Full Profile

Dr. Stephen G Jones , MD

Internal Medicine

Active NPI Status
5 Perryridge Rd, Outpatient Services, Greenwich, CT 068304608
Phone: 2038633308
NPI Identifier 1174547038
View Full Profile

Catherine Spinney Joyce

Internal Medicine

Active NPI Status
5 Perryridge Rd, Greenwich, CT 068304608
Phone: 2038633409
NPI Identifier 1265850218
View Full Profile

Dr. Mary Margaret Kane-Brock , MD

Internal Medicine

Active NPI Status Accepts Medicare Assignment
75 Holly Hill Ln, Greenwich, CT 068306098
Phone: 2038696960
NPI Identifier 1245312305
View Full Profile

Dr. Erika Shannon Krauss , DO

Internal Medicine

Active NPI Status
7 Riversville Rd Ste 1, Greenwich, CT 068313697
Phone: 2035311808
NPI Identifier 1437239621
View Full Profile

Frequently Asked Questions about Internal Medicine in Greenwich

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 Connecticut 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.