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GREENWICH ANESTHESIOLOGY ASSOCIATES, PC
NPI 1972557486
Anesthesiology in Greenwich, CT

Active since May 20, 2006
5 PERRYRIDGE RD, GREENWICH, CT 06830(203) 579-9464 Get Directions Write a Review

NPPES record last updated: January 13, 2022. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Jan 13, 2022, Dec 21, 2021 (2 updates tracked since 2021).

About Greenwich Anesthesiology Associates, Pc NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

GREENWICH ANESTHESIOLOGY ASSOCIATES, PC (NPI 1972557486) is a healthcare organization registered as an anesthesiology in Greenwich, Connecticut and active in the NPI registry since May 2006. The organization lists Paul Sygall, Delegated Official, as its authorized official.

NPPES Registry Identity

NPI1972557486
Entity TypeOrganization
Primary Taxonomy207L00000X
Legal Business NameGREENWICH ANESTHESIOLOGY ASSOCIATES, PC
Location Address5 PERRYRIDGE RDGreenwich, CT 06830-4608
Mailing Address255 W Michigan AveJackson, MI 49201-2218 · (517) 787-6440 · Fax (517) 787-4146
Phone(203) 579-9464
Organization SubpartNo
Authorized OfficialPaul SygallDelegated Official · (203) 579-9464
Enumeration DateMay 20, 2006
Last NPPES UpdateJanuary 13, 20222 updates tracked since enumeration
NPPES CertifiedJanuary 13, 2022
✔ NPI 1972557486 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 5

★ Primary SpecialtyAnesthesiologyAllopathic & Osteopathic Physicians
Taxonomy Code207L00000X
Definition
An anesthesiologist is trained to provide pain relief and maintenance, or restoration, of a stable condition during and immediately following an operation or an obstetric or diagnostic procedure. The anesthesiologist assesses the risk of the patient undergoing surgery and optimizes the patient's condition prior to, during and after surgery. In addition to these management responsibilities, the anesthesiologist provides medical management and consultation in pain management and critical care medicine. Anesthesiologists diagnose and treat acute, long-standing and cancer pain problems; diagnose and treat patients with critical illnesses or severe injuries; direct resuscitation in the care of patients with cardiac or respiratory emergencies, including the need for artificial ventilation; and supervise post-anesthesia recovery.
Also ListedAnesthesiology · Pain MedicineTaxonomy 207LP2900X
Also ListedNurse PractitionerTaxonomy 363L00000X
Also ListedNurse Practitioner · Adult HealthTaxonomy 363LA2200X
Also ListedNurse Anesthetist, Certified RegisteredTaxonomy 367500000X
5 PERRYRIDGE RD, Greenwich, CT 06830
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Other Identifiers 2

Other500HBA037CT01CT · Blue Shield
Medicaid004001095CT

Group Practice 1

Group TaxonomyThis provider is a business group of one or more individual practitioners, who practice with different areas of specialization.193200000X MULTI-SPECIALTY GROUP

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Greenwich Anesthesiology Associates, Pc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

42

Medicare enrollment records show 42 clinicians reassign Medicare billing to Greenwich Anesthesiology Associates, PC, which bills Medicare for the services they deliver. Of these, 6 practice at this address and 16 within 10 miles. Listed here are the 20 practicing nearest to this location.

Clinicians by Medicare Specialty 3

Certified Registered Nurse Anesthetist (CRNA)22
Anesthesiology19
Nurse Practitioner1

Nearest to this location (20)

See all 42
Victoria Feinstein, CRNA
Certified Registered Nurse Anesthetist (CRNA)
NPI 1982445987
5 PERRYRIDGE RD
Greenwich, CT 06830
(203) 863-3000
✔ PECOS✔ Accepts MedicareSame address
Rosemary Perley-Kwauk, CRNA
Certified Registered Nurse Anesthetist (CRNA)
NPI 1013944180
5 PERRYRIDGE RD
Greenwich, CT 06830
(203) 661-5330
✔ PECOS✔ Accepts MedicareSame address
Jared Rosenberg, M.D.
Anesthesiology
NPI 1972985323
5 PERRYRIDGE RD
Greenwich, CT 06830
(203) 863-3579
✔ PECOS✔ Accepts MedicareSame address
Jessica Sheehy, CRNA
Certified Registered Nurse Anesthetist (CRNA)
NPI 1588085476
5 PERRYRIDGE RD
Greenwich, CT 06830
(917) 589-1013
✔ PECOS✔ Accepts MedicareSame address
Caroline Ward
Certified Registered Nurse Anesthetist (CRNA)
NPI 1528652385
5 PERRYRIDGE RD
Greenwich, CT 06830
(203) 863-3390
✔ PECOS✔ Accepts MedicareSame address
Jaclyn Porco
Certified Registered Nurse Anesthetist (CRNA)
NPI 1043645161
5 PERRYRIDGE RD
Greenwich, CT 06830
(212) 746-2959
✔ PECOS✔ Accepts MedicareSame address
Hanief Abrahams, M.D.
Anesthesiology
NPI 1497798235
5 PERRYRIDGE RD
Greenwich, CT 06830
(203) 661-5330
✔ PECOS✔ Accepts MedicareSame address
Terry Cochran, M.D.
Anesthesiology
NPI 1184653826
5 PERRYRIDGE RD
Greenwich, CT 06830
(203) 661-5330
✔ PECOS✔ Accepts MedicareSame address
Michael Levin, M.D
Anesthesiology
NPI 1992734636
5 PERRYRIDGE RD
Greenwich, CT 06830
(203) 661-5330
✔ PECOS✔ Accepts MedicareSame address
Janice Meyer, CRNA
Certified Registered Nurse Anesthetist (CRNA)
NPI 1710916457
5 PERRYRIDGE RD
Greenwich, CT 06830
(203) 661-5330
✔ PECOS✔ Accepts MedicareSame address
Catherine Onorato, CRNA
Certified Registered Nurse Anesthetist (CRNA)
NPI 1295757052
5 PERRYRIDGE RD
Greenwich, CT 06830
(203) 661-5330
✔ PECOS✔ Accepts MedicareSame address
Paul Sygall, M.D
Anesthesiology
NPI 1568404895
5 PERRYRIDGE RD
Greenwich, CT 06830
(203) 661-5330
✔ PECOS✔ Accepts MedicareSame address
Alfonso Tagliavia, M.D
Anesthesiology
NPI 1316973399
5 PERRYRIDGE RD
Greenwich, CT 06830
(203) 661-5330
✔ PECOS✔ Accepts MedicareSame address
Francisco Brea, MD
Anesthesiology
NPI 1013956952
5 PERRYRIDGE RD
Greenwich, CT 06830
(203) 661-5330
✔ PECOS✔ Accepts Medicare0.1 mi
Ann Boisvert, NP
Nurse Practitioner
NPI 1699399618
5 PERRYRIDGE RD STE 2-248
Greenwich, CT 06830
(203) 863-3390
✔ PECOS0.6 mi
Adelina Clarke, CRNA
Certified Registered Nurse Anesthetist (CRNA)
NPI 1891020244
41 E POST RD
White Plains, NY 10601
(914) 681-0600
✔ PECOS✔ Accepts Medicare7.4 mi
Ruth Perry, CRNA
Certified Registered Nurse Anesthetist (CRNA)
NPI 1003819871
24 STEVENS ST
Norwalk, CT 06850
(203) 852-2276
✔ PECOS✔ Accepts Medicare12 mi
Lucas Bejar, M.D.
Anesthesiology
NPI 1679734644
27005 76TH AVE DEPT OF ANESTHESIA
New Hyde Park, NY 11040
(718) 470-7390
✔ PECOS✔ Accepts Medicare20 mi
Marc Gurny, M.D.
Anesthesiology
NPI 1083974794
622 W 168TH ST PH5-505
New York, NY 10032
(212) 305-9876
✔ PECOS✔ Accepts Medicare21 mi
David Shapiro, M.D.
Anesthesiology
NPI 1477895381
1 GUSTAVE L LEVY PL
New York, NY 10029
(516) 375-9323
✔ PECOS✔ Accepts Medicare24 mi
See all 42 clinicians

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Greenwich Anesthesiology Associates, PC's NPI number?

The NPI number for Greenwich Anesthesiology Associates, PC is 1972557486. It was assigned to this organization in the NPPES registry on May 20, 2006.

Where is Greenwich Anesthesiology Associates, PC located?

Greenwich Anesthesiology Associates, PC is located at 5 Perryridge Rd, Greenwich, CT 06830. The listed phone number is (203) 579-9464.

What is Greenwich Anesthesiology Associates, PC's specialty?

The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.

Is Greenwich Anesthesiology Associates, PC enrolled in Medicare?

Yes. Greenwich Anesthesiology Associates, PC is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Greenwich Anesthesiology Associates, PC?

According to the CMS Revalidation Reassignment List (October 2026 release), 42 clinicians in 3 Medicare specialties reassign their Medicare billing to Greenwich Anesthesiology Associates, PC. A reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for the clinician's services. The largest specialties are Certified Registered Nurse Anesthetist (CRNA) (22), Anesthesiology (19) and Nurse Practitioner (1). Of these, 6 practice at this address and 16 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

What insurance does Greenwich Anesthesiology Associates, PC accept?

Health plans from Anthem Blue Cross and Blue Shield list Greenwich Anesthesiology Associates, PC as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Greenwich Anesthesiology Associates, PC was last updated on January 13, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.