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John T. Mather Memorial Hospital

Q: What is the NPI number for John T. Mather Memorial Hospital?

The NPI for John T. Mather Memorial Hospital is 1417044066, a Type 2 (organization) record in the CMS NPPES registry.

Family Nurse Practitioner in Port Jefferson, NY · enumerated 2006 · authorized official Joseph Wisnoski, Vice President Finance.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1417044066

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Registry record

Entity type Organization (Type 2)

Legal business name John T. Mather Memorial Hospital

Practice address 75 N Country Rd, Port Jefferson, NY, 11777

Phone (631) 473-1320

Fax (631) 686-7972

Enumeration date Oct 6, 2006

Last updated in NPPES Apr 29, 2015

Taxonomy & classification

363LF0000X Family Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers Primary

Authorized official

Name Joseph Wisnoski

Title Vice President Finance

Phone (631) 473-1320

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for John T. Mather Memorial Hospital?

The NPI for John T. Mather Memorial Hospital is 1417044066, a Type 2 (organization) record in the CMS NPPES registry.

Who is the authorized official for John T. Mather Memorial Hospital?

NPPES lists Joseph Wisnoski (Vice President Finance) as the authorized official for this organization.

Providers at this address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-04-29.