EASTERN NEW YORK MEDICAL SERVICES PC
NPI 1831437599
Internal Medicine in Brewster, NY
About Eastern New York Medical Services Pc NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
EASTERN NEW YORK MEDICAL SERVICES PC (NPI 1831437599) is a healthcare organization registered as an internal medicine in Brewster, New York and active in the NPI registry since January 2013. The organization lists Matthew Kessler, President, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
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)
Eastern New York Medical Services Pc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Revalidation Due Date
Revalidation due by November 30, 2026
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
6Medicare enrollment records show 6 clinicians reassign Medicare billing to Eastern New York Medical Services PC, which bills Medicare for the services they deliver. Of these, 4 practice at this address and 5 within 10 miles. They are listed nearest first.
Clinicians, nearest first (6)
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 Eastern New York Medical Services PC's NPI number?
The NPI number for Eastern New York Medical Services PC is 1831437599. It was assigned to this organization in the NPPES registry on January 30, 2013.
Where is Eastern New York Medical Services PC located?
Eastern New York Medical Services PC is located at 3423 Danbury Rd, Brewster, NY 10509. The listed phone number is (845) 279-7200.
What is Eastern New York Medical Services PC's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Eastern New York Medical Services PC enrolled in Medicare?
Yes. Eastern New York Medical Services PC is registered in the Medicare PECOS enrollment system.
When is Eastern New York Medical Services PC'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 November 30, 2026. 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 Eastern New York Medical Services PC?
According to the CMS Revalidation Reassignment List (October 2026 release), 6 clinicians in 3 Medicare specialties reassign their Medicare billing to Eastern New York Medical Services PC. 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. The largest specialties are Internal Medicine (4), Colorectal Surgery (Proctology) (1) and Family Practice (1). Of these, 4 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 Eastern New York Medical Services PC was last updated on April 23, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.
# Eastern New York Medical Services Pc · NPI 1831437599
Internal Medicine organization in Brewster, New York. Organization record, active in the CMS NPPES registry since January 30, 2013.
## Identity
- **NPI:** 1831437599 (Entity type: Organization)
- **Enumerated:** January 30, 2013
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **Organization subpart:** No
- **Authorized official:** Matthew Kessler, PRESIDENT
## Practice location
- **Address:** 3423 DANBURY RD, Brewster, NY 10509-4513
- **Phone:** (845) 279-7200
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Medicare revalidation due:** November 30, 2026 (Non-DME Part B, New York, Clinic/Group Practice) · CMS Revalidation Due Date List, October 2026 release
- **Clinicians billing through this organization:** 6 clinicians in 3 Medicare specialties reassign Medicare billing to this organization (form CMS-855R); largest: Internal Medicine (4), Colorectal Surgery (Proctology) (1), Family Practice (1); 4 practice at this address and 5 within 10 miles · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** April 23, 2024
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Source: [NPI Profile](https://npiprofile.com/npi/1831437599) · Data from the CMS NPPES public registry.