GREATER NEW YORK GASTROENTEROLOGY, LLP
NPI 1558375584
Internal Medicine - Gastroenterology in Astoria, NY
About Greater New York Gastroenterology, Llp NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
GREATER NEW YORK GASTROENTEROLOGY, LLP (NPI 1558375584) is a healthcare organization registered as a gastroenterology in Astoria, New York and active in the NPI registry since July 2006. The organization lists Jeffrey Kenneth Klingenstein, Officer, as its authorized official.
NPPES Registry Identity
Specialties & Licenses 2
Other Identifiers 3
Group Practice 1
Medicare Participation & PECOS CMS
Medicare enrollment, revalidation and the clinicians who bill Medicare through this organization, from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Greater New York Gastroenterology, Llp is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Revalidation Due Date
Revalidation due by March 31, 2027
Medicare-enrolled providers and suppliers confirm their enrollment information with CMS on a set cycle, every 5 years for most and every 3 years for medical equipment suppliers. CMS sets the due date for each enrollment.
Clinicians Billing Medicare Through This Organization
5Medicare enrollment records show 5 clinicians reassign Medicare billing to Greater New York Gastroenterology, LLP, which bills Medicare for the services they deliver. Of these, 3 practice at this address and 5 within 10 miles. They are listed nearest first.
Clinicians, nearest first (5)
New York, NY 10016
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 Greater New York Gastroenterology, LLP's NPI number?
The NPI number for Greater New York Gastroenterology, LLP is 1558375584. It was assigned to this organization in the NPPES registry on July 27, 2006.
Where is Greater New York Gastroenterology, LLP located?
Greater New York Gastroenterology, LLP is located at 2325 31st St Ste 500, Astoria, NY 11105. The listed phone number is (718) 626-2337.
What is Greater New York Gastroenterology, LLP's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.
Is Greater New York Gastroenterology, LLP enrolled in Medicare?
Yes. Greater New York Gastroenterology, LLP is registered in the Medicare PECOS enrollment system.
When is Greater New York Gastroenterology, LLP's Medicare revalidation due?
According to the CMS Revalidation Due Date List (October 2026 release), the Medicare Non-DME Part B enrollment for this organization (New York, Clinic/Group Practice) is due for revalidation by March 31, 2027. Medicare providers and suppliers revalidate their enrollment every 5 years, and medical equipment suppliers every 3 years. Confirm current requirements with your Medicare Administrative Contractor.
How many clinicians bill Medicare through Greater New York Gastroenterology, LLP?
According to the CMS Revalidation Reassignment List (October 2026 release), 5 clinicians reassign their Medicare billing to Greater New York Gastroenterology, LLP, in Gastroenterology, Internal Medicine and Pathology. 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. Of these, 3 practice at this address and 5 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
When was this NPI record last updated?
The NPPES record for Greater New York Gastroenterology, LLP was last updated on August 26, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.
# Greater New York Gastroenterology, Llp · NPI 1558375584
Gastroenterology organization in Astoria, New York. Organization record, active in the CMS NPPES registry since July 27, 2006.
## Identity
- **NPI:** 1558375584 (Entity type: Organization)
- **Enumerated:** July 27, 2006
- **Primary specialty:** Internal Medicine - Gastroenterology · taxonomy 207RG0100X
- **Organization subpart:** No
- **Authorized official:** Jeffrey Klingenstein, OFFICER
## Practice location
- **Address:** 2325 31ST ST STE 500, Astoria, NY 11105-2299
- **Phone:** (718) 626-2337 · **Fax:** (718) 626-7655
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Medicare revalidation due:** March 31, 2027 (Non-DME Part B, New York, Clinic/Group Practice) · CMS Revalidation Due Date List, October 2026 release
- **Clinicians billing through this organization:** 5 clinicians in 3 Medicare specialties reassign Medicare billing to this organization (form CMS-855R); largest: Gastroenterology (2), Pathology (2), Internal Medicine (1); 3 practice at this address and 5 within 10 miles · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** August 26, 2019
- **Other identifiers:** Medicaid 01366985 (NY); Medicaid 00617905 (NY); Medicaid 02167173 (NY)
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Source: [NPI Profile](https://npiprofile.com/npi/1558375584) · Data from the CMS NPPES public registry.