INTENSIVISTS
NPI 1821244757
General Acute Care Hospital in Port Jefferson, NY
About Intensivists NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
INTENSIVISTS (NPI 1821244757) is a healthcare organization registered as a general acute care hospital in Port Jefferson, New York and active in the NPI registry since August 2008. The organization lists Joseph Wisnoski, Authorized Official, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
Other Names 1
Other Identifiers 1
Medicare Participation & PECOS CMS
Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Intensivists is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
232Medicare enrollment records show 232 clinicians reassign Medicare billing to Intensivists, which bills Medicare for the services they deliver. Of these, 61 practice at this address and 107 within 10 miles. Listed here are the 20 practicing nearest to this location.
Clinicians by Medicare Specialty 14
Nearest to this location (20)
See all 232Port Jefferson, NY 11777
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 John T Mather Memorial Hospital's NPI number?
The NPI number for John T Mather Memorial Hospital is 1821244757. It was assigned to this organization in the NPPES registry on August 12, 2008. The provider is also known as Intensivists.
Where is John T Mather Memorial Hospital located?
John T Mather Memorial Hospital is located at 75 N Country Rd, Port Jefferson, NY 11777. The listed phone number is (631) 473-1320.
What is John T Mather Memorial Hospital's specialty?
The primary specialty registered for this NPI is General Acute Care Hospital with taxonomy code 282N00000X.
Is John T Mather Memorial Hospital enrolled in Medicare?
Yes. John T Mather Memorial Hospital is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through John T Mather Memorial Hospital?
According to the CMS Revalidation Reassignment List (October 2026 release), 232 clinicians in 14 Medicare specialties reassign their Medicare billing to John T Mather Memorial Hospital. 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 Nurse Practitioner (70), Emergency Medicine (62) and Internal Medicine (29). Of these, 61 practice at this address and 107 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 John T Mather Memorial Hospital was last updated on August 12, 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.
# Intensivists · NPI 1821244757
General Acute Care Hospital organization in Port Jefferson, New York. Organization record, active in the CMS NPPES registry since August 12, 2008.
## Identity
- **NPI:** 1821244757 (Entity type: Organization)
- **Enumerated:** August 12, 2008
- **Primary specialty:** General Acute Care Hospital · taxonomy 282N00000X
- **Legal business name:** John T Mather Memorial Hospital
- **Organization subpart:** Yes (part of John T Mather Memorial Hospital)
- **Authorized official:** Joseph Wisnoski, AUTHORIZED OFFICIAL
## Practice location
- **Address:** 75 N COUNTRY RD, Port Jefferson, NY 11777-2119
- **Phone:** (631) 473-1320
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 232 clinicians in 14 Medicare specialties reassign Medicare billing to this organization (form CMS-855R); largest: Nurse Practitioner (70), Emergency Medicine (62), Internal Medicine (29); 61 practice at this address and 107 within 10 miles; [full list](https://npiprofile.com/npi/1821244757/clinicians) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** August 12, 2008
- **Other identifiers:** Medicaid 02859121 (NY)
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Source: [NPI Profile](https://npiprofile.com/npi/1821244757) · Data from the CMS NPPES public registry.