DR. GREGG LAWRENCE CHESNEY M.D.
NPI 1861637365
Emergency Medicine in New York, NY
About Dr. Gregg Lawrence Chesney M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. GREGG LAWRENCE CHESNEY M.D. (NPI 1861637365) is an individual emergency medicine provider in New York, New York, licensed in New York (250576) and active in the NPI registry since December 2008. He is enrolled in Medicare PECOS, is affiliated with Phelps Hospital, and is a graduate of University Of Rochester School Of Medicine And Dentistry (2007).
NPPES Registry Identity
Specialties & Licenses
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Gregg Lawrence Chesney M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
4Medicare enrollment records show Gregg Chesney reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Brooklyn, NY 11219
- Reassigned Medicare billing, New York enrollment
- 23 clinicians in this Medicare group
Brooklyn, NY 11219
- Reassigned Medicare billing, New York enrollment
- 189 clinicians in this Medicare group
New Hyde Park, NY 11040
- Reassigned Medicare billing, New York enrollment
- 9,353 clinicians in this Medicare group
Boynton Beach, FL 33426
- Reassigned Medicare billing, New York enrollment
- 7,712 clinicians in this Medicare group
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 4
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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Phelps Hospital
Acute Care Hospitals · Sleepy Hollow, NYPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 10016 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
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.
NEW YORK, NY 10016
NEW YORK, NY 10016
NEW YORK, NY 10016
NEW YORK, NY 10016
NEW YORK, NY 10016
NEW YORK, NY 10016
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 Gregg Chesney's NPI number?
The NPI number for Gregg Chesney is 1861637365. It was assigned to this individual provider in the NPPES registry on December 11, 2008.
Where is Gregg Chesney located?
Gregg Chesney practices at 550 1st Ave, New York, NY 10016. The listed phone number is (212) 263-3293.
What is Gregg Chesney's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Gregg Chesney enrolled in Medicare?
Yes. Gregg Chesney is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Gregg Chesney's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Gregg Chesney reassigns Medicare benefits to 4 organizations: Maimonides Medical Center - Maimo Criticare Fpp (Brooklyn, NY), Maimonides Medical Center - Mmc Emergency Physicians Fpp (Brooklyn, NY), North Shore - Lij Medical PC (New Hyde Park, NY) and New York University (Boynton Beach, FL). 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 Gregg Chesney's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Gregg Chesney affiliated with any hospitals?
According to CMS data, Gregg Chesney is affiliated with Phelps Hospital.
When was this NPI record last updated?
The NPPES record for Gregg Chesney was last updated on March 9, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.
# Dr. Gregg Lawrence Chesney, M.D. · NPI 1861637365
Emergency Medicine physician in New York, New York. Individual provider, active in the CMS NPPES registry since December 11, 2008.
## Identity
- **NPI:** 1861637365 (Entity type: Individual)
- **Enumerated:** December 11, 2008
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 250576 (New York)
- **Sole proprietor:** No
## Practice location
- **Address:** 550 1ST AVE, New York, NY 10016-6402
- **Phone:** (212) 263-3293
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 4 organizations under Medicare reassignment (form CMS-855R): Maimonides Medical Center - Maimo Criticare Fpp (NPI 1265547178, Brooklyn, NY); Maimonides Medical Center - Mmc Emergency Physicians Fpp (NPI 1982708202, Brooklyn, NY); North Shore - Lij Medical PC (NPI 1790043479, New Hyde Park, NY); New York University (NPI 1285826438, Boynton Beach, FL) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Rochester School Of Medicine And Dentistry, class of 2007
## Record status
- **NPPES last updated:** March 9, 2021
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Source: [NPI Profile](https://npiprofile.com/npi/1861637365) · Data from the CMS NPPES public registry.