DR. GREGORY CHANG MD, MBA
NPI 1154940419
Emergency Medicine - Emergency Medical Services in New York, NY
About Dr. Gregory Chang Md, Mba NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. GREGORY CHANG MD, MBA (NPI 1154940419) is an individual emergency medical services provider in New York, New York, licensed in New York (326294-01) and active in the NPI registry since April 2020. He is enrolled in Medicare PECOS, is affiliated with New York-presbyterian Hospital, and is a graduate of Other (2020).
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. Gregory Chang Md, Mba 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
5Medicare enrollment records show Gregory Chang reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
New York, NY 10021
- Reassigned Medicare billing, New York enrollment
- 74 clinicians in this Medicare group
New York, NY 10021
- Reassigned Medicare billing, New York enrollment
- 226 clinicians in this Medicare group
Uniondale, NY 11553
- Reassigned Medicare billing, New York enrollment
- 191 clinicians in this Medicare group
West Harrison, NY 10604
- Reassigned Medicare billing, New York enrollment
- 328 clinicians in this Medicare group
Commack, NY 11725
- Reassigned Medicare billing, New York enrollment
- 265 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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
New York-Presbyterian Hospital
Acute Care Hospitals · New York, NYPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 10065 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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 10065
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 Gregory Chang's NPI number?
The NPI number for Gregory Chang is 1154940419. It was assigned to this individual provider in the NPPES registry on April 15, 2020.
Where is Gregory Chang located?
Gregory Chang practices at 1275 York Ave, New York, NY 10065. The listed phone number is (718) 250-8000.
What is Gregory Chang's specialty?
The primary specialty registered for this NPI is Emergency Medicine, specializing in Emergency Medical Services, with taxonomy code 207PE0004X.
Is Gregory Chang enrolled in Medicare?
Yes. Gregory Chang 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 Gregory Chang's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Gregory Chang reassigns Medicare benefits to 5 organizations: Memorial Urgent Care Group (New York, NY), Weill Medical College Of Cornell (New York, NY), Msk Nassau (Uniondale, NY), Msk Harrison (West Harrison, NY) and Mskcc Regional Network (Commack, 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 Gregory Chang's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Gregory Chang affiliated with any hospitals?
According to CMS data, Gregory Chang is affiliated with New York-Presbyterian Hospital.
When was this NPI record last updated?
The NPPES record for Gregory Chang was last updated on March 7, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 months 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. Gregory Chang, MD, MBA · NPI 1154940419
Emergency Medical Services physician in New York, New York. Individual provider, active in the CMS NPPES registry since April 15, 2020.
## Identity
- **NPI:** 1154940419 (Entity type: Individual)
- **Enumerated:** April 15, 2020
- **Primary specialty:** Emergency Medicine - Emergency Medical Services · taxonomy 207PE0004X
- **State license:** 326294-01 (New York)
- **Sole proprietor:** No
## Practice location
- **Address:** 1275 YORK AVE, New York, NY 10065-6007
- **Phone:** (718) 250-8000
## 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:** 5 organizations under Medicare reassignment (form CMS-855R): Memorial Urgent Care Group (NPI 1053364539, New York, NY); Weill Medical College Of Cornell (NPI 1205882586, New York, NY); Msk Nassau (NPI 1053875229, Uniondale, NY); Msk Harrison (NPI 1174923593, West Harrison, NY); Mskcc Regional Network (NPI 1740251297, Commack, NY) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2020
## Record status
- **NPPES last updated:** March 7, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1154940419) · Data from the CMS NPPES public registry.