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GARY GREENWALD M.D.
NPI 1942287024
Emergency Medicine in New Hyde Park, NY

Active since December 29, 2005PECOS Enrolled
2800 MARCUS AVE, NEW HYDE PARK, NY 11042(516) 622-6000 Get Directions Write a Review

NPPES record last updated: February 19, 2015. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Gary Greenwald M.d. NPPES

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

GARY GREENWALD M.D. (NPI 1942287024) is an individual emergency medicine provider in New Hyde Park, New York, licensed in New York (154918-1) and active in the NPI registry since December 2005. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1942287024
Entity TypeIndividualMale
Primary Taxonomy207P00000X
Provider Legal NameGARY GREENWALDCredential: M.D.
Location Address2800 MARCUS AVENew Hyde Park, NY 11042-1113
Mailing AddressPo Box 826223Philadelphia, PA 19182-6223 · (866) 898-7142 · Fax (770) 237-1723
Phone(516) 622-6000
Sole ProprietorYes
Enumeration DateDecember 29, 2005
Last NPPES UpdateFebruary 19, 2015
✔ NPI 1942287024 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207P00000X
License✔ Licensed in NY · 154918-1
Definition
An emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department. The emergency physician provides immediate recognition, evaluation, care, stabilization and disposition of a generally diversified population of adult and pediatric patients in response to acute illness and injury.
2800 MARCUS AVE, New Hyde Park, NY 11042
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Other Identifiers 5

Medicare PIN930122560
Medicaid01008259NY
Medicare UPIND91747
Medicare PIN01E491NY
Other773V41NY · Bluecross Blueshield

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Gary Greenwald M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

2

Medicare enrollment records show Gary Greenwald reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

South Nassau Physician Group PC
8.2 mi
Emergency Medicine
1 HEALTHY WAY
Oceanside, NY 11572
  • Reassigned Medicare billing, New York enrollment
  • 52 clinicians in this Medicare group
NPI 1922460542 (516) 632-3000
Island Emergency Medical Services, P.C.
12 mi
Emergency Medicine
327 BEACH 19TH ST
Far Rockaway, NY 11691
  • Reassigned Medicare billing, New York enrollment
  • Medicare enrollment name: Island Emergency Medical Services PC
  • 290 clinicians in this Medicare group
NPI 1639160385 (844) 474-4019

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

Areas of Expertise CMS Part B claims 3

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Emergency department visit with moderate level of medical decision making 99284
An emergency department visit for a high-severity issue means you're experiencing a serious health problem that needs immediate attention. This could be a severe injury, serious illness, or life-threatening condition. Medical professionals will provide urgent care to stabilize your condition.
150 services142 patients
Emergency department visit with high level of medical decision making 99285
An emergency department visit for severe conditions is when you urgently seek medical help due to serious health issues. These could be severe injuries, breathing problems, unbearable pain, or sudden severe illness. Doctors and nurses will provide immediate care to stabilize your condition.
48 services47 patients
Emergency department visit with low level of medical decision making 99283
An emergency department visit for a problem of moderate severity involves immediate medical attention for issues like minor fractures, burns, or high fever. The healthcare team will assess your condition, provide necessary treatment, and may suggest further tests or admission if required.
41 services40 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 11042 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$105.06 typical visit price
range $67.40 – $203.53
Typical copayment $26.26 (range $16.85 – $50.88)
Most-billed visit code 99203
Established Patient
$117.62 typical visit price
range $21.66 – $164.45
Typical copayment $29.40 (range $5.41 – $41.11)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MRS. LISA VITUCCI LCSW-R
Social Worker (Clinical)
2800 MARCUS AVE, SUITE 205
NEW HYDE PARK, NY 11042
Nassau County (516) 622-6000
DENNIS WILLIAM TREUBIG D.P.T.
Physical Therapist
2800 MARCUS AVE
NEW HYDE PARK, NY 11042
Nassau County (516) 622-6161
GISELE WOLF-KLEIN MD
Internal Medicine (Geriatric Medicine)
2800 MARCUS AVE, SUITE 200
NEW HYDE PARK, NY 11042
Nassau County (516) 708-2522
KENNETH ANTHONY SCIOSCIA MD
Otolaryngology
2800 MARCUS AVE
NEW HYDE PARK, NY 11042
Nassau County (516) 622-3377
ALLEN J WIESENFELD MD
Radiology (Vascular & Interventional Radiology)
2800 MARCUS AVE
LAKE SUCCESS, NY 11042
Nassau County (516) 622-6100
DR. BARRY COHEN M.D.
Anesthesiology
2800 MARCUS AVE
NEW HYDE PARK, NY 11042
Nassau County (516) 622-6000
DR. SHAMALA GANDHI M.D.
Anesthesiology
2800 MARCUS AVE
NEW HYDE PARK, NY 11042
Nassau County (516) 622-6000
HOWARD GUZIK MD
Internal Medicine (Geriatric Medicine)
2800 MARCUS AVE
NEW HYDE PARK, NY 11042
Nassau County (516) 708-2520

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 Gary Greenwald's NPI number?

The NPI number for Gary Greenwald is 1942287024. It was assigned to this individual provider in the NPPES registry on December 29, 2005.

Where is Gary Greenwald located?

Gary Greenwald practices at 2800 Marcus Ave, New Hyde Park, NY 11042. The listed phone number is (516) 622-6000.

What is Gary Greenwald's specialty?

The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.

Is Gary Greenwald enrolled in Medicare?

Yes. Gary Greenwald is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Gary Greenwald's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Gary Greenwald reassigns Medicare benefits to 2 organizations: South Nassau Physician Group PC (Oceanside, NY) and Island Emergency Medical Services, P.C. (Far Rockaway, NY). Each 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 Gary Greenwald's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Gary Greenwald was last updated on February 19, 2015. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.