GEORGE NICHOLAS CORITSIDIS MD
NPI 1003855610
Internal Medicine - Nephrology in Elmhurst, NY
About George Nicholas Coritsidis Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
GEORGE NICHOLAS CORITSIDIS MD (NPI 1003855610) is an individual nephrology provider in Elmhurst, New York, licensed in New York (163705) and active in the NPI registry since June 2006. He is enrolled in Medicare PECOS, is affiliated with Ns/lij Hs Southside Hospital, and is a graduate of State University Of Ny Upstate Medical University (1983).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 4
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
George Nicholas Coritsidis Md 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 George Coritsidis reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Elmhurst, NY 11373
- Reassigned Medicare billing, New York enrollment
- 836 clinicians in this Medicare group
New York, NY 10029
- Reassigned Medicare billing, New York enrollment
- 65 clinicians in this Medicare group
Valhalla, NY 10595
- Reassigned Medicare billing, New York enrollment
- 1,663 clinicians in this Medicare group
Port Jefferson, NY 11777
- Reassigned Medicare billing, New York enrollment
- Also billed through NPI 1467249334 (New York)
- 232 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 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Ns/Lij Hs Southside Hospital
Acute Care Hospitals · Bay Shore, NYJohn T Mather Memorial Hospital Of Port Jefferson
Acute Care Hospitals · Port Jefferson, NYPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 11373 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.
ELMHURST, NY 11373
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 George Coritsidis's NPI number?
The NPI number for George Coritsidis is 1003855610. It was assigned to this individual provider in the NPPES registry on June 6, 2006.
Where is George Coritsidis located?
George Coritsidis practices at 7901 Broadway Room A1-9, Elmhurst, NY 11373. The listed phone number is (718) 334-4952.
What is George Coritsidis's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Nephrology, with taxonomy code 207RN0300X.
Is George Coritsidis enrolled in Medicare?
Yes. George Coritsidis 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 George Coritsidis's services?
According to the CMS Revalidation Reassignment List (October 2026 release), George Coritsidis reassigns Medicare benefits to 4 organizations: Icahn School Of Medicine At Mount Sinai (Elmhurst, NY), Icahn School Of Medicine At Mount Sinai (New York, NY), Westchester Medical Center Advanced Physician Services PC (Valhalla, NY) and John T. Mather Memorial Hospital (Port Jefferson, 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 George Coritsidis's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is George Coritsidis affiliated with any hospitals?
According to CMS data, George Coritsidis is affiliated with Ns/Lij Hs Southside Hospital and John T Mather Memorial Hospital Of Port Jefferson.
When was this NPI record last updated?
The NPPES record for George Coritsidis was last updated on January 16, 2008. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 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.
# George Nicholas Coritsidis, MD · NPI 1003855610
Nephrology physician in Elmhurst, New York. Individual provider, active in the CMS NPPES registry since June 6, 2006.
## Identity
- **NPI:** 1003855610 (Entity type: Individual)
- **Enumerated:** June 6, 2006
- **Primary specialty:** Internal Medicine - Nephrology · taxonomy 207RN0300X
- **State license:** 163705 (New York)
- **Sole proprietor:** No
## Practice location
- **Address:** 7901 BROADWAY, ROOM A1-9, Elmhurst, NY 11373-1329
- **Phone:** (718) 334-4952 · **Fax:** (718) 334-4815
## 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): Icahn School Of Medicine At Mount Sinai (NPI 1578817540, Elmhurst, NY); Icahn School Of Medicine At Mount Sinai (NPI 1730440777, New York, NY); Westchester Medical Center Advanced Physician Services PC (NPI 1740687458, Valhalla, NY); John T. Mather Memorial Hospital (NPI 1104913748, Port Jefferson, NY) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** State University Of Ny Upstate Medical University, class of 1983
## Record status
- **NPPES last updated:** January 16, 2008
- **Other identifiers:** Medicare UPIN E87440 (NY); Medicaid 01477114 (NY); Medicare UPIN 5324UW (NY); and 1 more
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Source: [NPI Profile](https://npiprofile.com/npi/1003855610) · Data from the CMS NPPES public registry.