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

Emergency Medicine Providers in Greenwich, CT

Browse 13 Emergency Medicine providers listed in NPPES with a practice address in Greenwich, Connecticut.

13 Healthcare Providers

How Greenwich compares with the U.S.

Greenwich has 88 clinicians in Emergency Medicine per 100,000 residents, 4.2 times the U.S. rate of 21.

That is 13 active clinicians in Emergency Medicine with a practice address in Greenwich, for a population of 14,792.

The Connecticut rate is 23 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 Emergency Medicine in Greenwich listed in the CMS Medicare file (10 of 10) accept Medicare assignment. That is similar to the Connecticut share of 99%.

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.

None of the 10 clinicians in Emergency Medicine in Greenwich listed in the CMS Medicare file have a CMS telehealth indicator. Some may still offer telehealth; ask the office.

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).

Emergency Medicine Medicare (PECOS) Enrollment & Ordering Eligibility

Medicare enrollment and order/referring eligibility listed by CMS for Emergency Medicine practitioners in Greenwich, CT

Source: CMS PECOS
PECOS Enrolled Specialists 11 In Greenwich, CT
Part B Lab & Imaging Eligible 11 Diagnostic Referrals
DME Ordering Eligible 11 Durable Medical Equipment
Home Health Agency Referrals 11 HHA Ordering Eligible
Showing 1โ€“13 of 13 providers
With recent CMS data first, then Aโ€“Z

Dr. Maria Brea , MD

Emergency Medicine

Active NPI Status Accepts Medicare Assignment
5 Perryridge Rd, Greenwich, CT 068304697
Phone: 2038633000
NPI Identifier 1508809161
View Full Profile

Dr. J. Allen Britvan , MD

Emergency Medicine

Active NPI Status
5 Perryridge Rd, Emergency Department, Greenwich, CT 068304608
Phone: 2038633637
NPI Identifier 1376566042
View Full Profile

Dr. Michael S Canter , MD

Emergency Medicine

Active NPI Status Accepts Medicare Assignment
5 Perryridge Rd, Emergency Department, Greenwich, CT 068304608
Phone: 2038633632
NPI Identifier 1558381483
View Full Profile

Dr. Ryan Patrick Casarella , MD

Emergency Medicine

Active NPI Status Accepts Medicare Assignment
5 Perryridge Rd, Greenwich, CT 068304697
Phone: 2038633000
NPI Identifier 1740643998
View Full Profile

Dr. Robert S Chang , MD

Emergency Medicine

Active NPI Status Accepts Medicare Assignment
5 Perryridge Rd, Greenwich Hospital, Greenwich, CT 068304608
Phone: 2038633637
NPI Identifier 1760581672
View Full Profile

Dr. Christopher M Davison , MD

Emergency Medicine

Active NPI Status Accepts Medicare Assignment
5 Perryridge Rd, Emergency Department, Greenwich, CT 068304608
Phone: 2038633637
NPI Identifier 1225051857
View Full Profile

Dr. Servando De Los Angeles , MD

Emergency Medicine

Active NPI Status Accepts Medicare Assignment
5 Perryridge Rd, Emergency Department, Greenwich, CT 068304608
Phone: 2038633637
NPI Identifier 1831119619
View Full Profile

Dr. Stacey M Donegan , MD

Emergency Medicine

Active NPI Status Accepts Medicare Assignment
5 Perryridge Rd, Emergency Department, Greenwich, CT 068304608
Phone: 2038633637
NPI Identifier 1174546709
View Full Profile

Dr. Shideh Imanian-Parsa , MD

Emergency Medicine

Active NPI Status Accepts Medicare Assignment
5 Perryridge Rd, Emergency Department, Greenwich, CT 068304608
Phone: 2038633637
NPI Identifier 1124049945
View Full Profile

Dr. Bonnie Mcguire Wreschner , MD

Emergency Medicine

Active NPI Status Accepts Medicare Assignment
5 Perryridge Road, Greenwich, CT 06830
Phone: 9739717926
NPI Identifier 1871789834
View Full Profile

Dr. Jeremiah H Tyson , MD

Emergency Medicine

Active NPI Status Accepts Medicare Assignment
5 Perryridge Rd, Greenwich, CT 068304608
Phone: 2038633000
NPI Identifier 1336382548
View Full Profile

Dr. Jeffrey Todd Weintraub , MD

Emergency Medicine

Active NPI Status
5 Perryridge Rd, Greenwich, CT 068304697
Phone: 2032038633
NPI Identifier 1457371098
View Full Profile

Dr. Jennifer M Provataris , MD

Emergency Medicine

Active NPI Status
5 Perryridge Rd, Emergency Department, Greenwich, CT 068304608
Phone: 2038633637
NPI Identifier 1588685234
View Full Profile

Frequently Asked Questions about Emergency Medicine in Greenwich

How do I check a Emergency 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.