John T. Mather Memorial Hospital
NPI 1467249334 · Critical Care Medicine (Internal Medicine) Physician · Port Jefferson, NY
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John T. Mather Memorial Hospital is a Critical Care Medicine (Internal Medicine) Physician organization in Port Jefferson, NY (NPI 1467249334).
Provider details
- NPI number
- 1467249334
- Entity type
- Organization
- Primary specialty
- Critical Care Medicine (Internal Medicine) PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Christine Livreri, Avp(631) 473-1320
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
1 yr in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
14 documented practice locations
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Additional practice locations (13)
- 500 Commack Rd Bldg ESuite 150dCommack, NY 11725-5020Phone: (631) 473-1320Fax: (631) 686-7972
- 125 Oakland Ave Ste 301Port Jefferson, NY 11777-2130Phone: (631) 473-1320Fax: (631) 686-7972
- 125 Oakland Ave Ste 303Port Jefferson, NY 11777-2130Phone: (631) 473-1320Fax: (631) 686-7972
- 100 Highlands Blvd Ste 101Port Jefferson, NY 11777-2320Phone: (631) 473-1320Fax: (631) 686-7972
- 100 Highlands Blvd Ste 303Port Jefferson, NY 11777-2320Phone: (631) 473-1320Fax: (631) 686-7972
- 100 Highlands Blvd Ste 201Port Jefferson, NY 11777-2320Phone: (631) 473-1320Fax: (631) 686-7972
- 200 Belle Terre RdPort Jefferson, NY 11777-1928Phone: (631) 473-1320Fax: (631) 686-7972
Registry dates
- Enumerated
- 2025-04-23
- Last updated
- 2025-04-23
- Certified
- 2025-04-23
Frequently asked questions
- What is John T. Mather Memorial Hospital's NPI number?
- John T. Mather Memorial Hospital's National Provider Identifier (NPI) is 1467249334, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is John T. Mather Memorial Hospital?
- John T. Mather Memorial Hospital is classified in the NPPES registry as Critical Care Medicine (Internal Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is John T. Mather Memorial Hospital located?
- John T. Mather Memorial Hospital's practice location on file with NPPES is 75 N Country Rd, Port Jefferson, NY 11777-2119.
- What is John T. Mather Memorial Hospital's phone number?
- The practice phone number listed in the NPPES registry for John T. Mather Memorial Hospital is (631) 473-1320.
- Does John T. Mather Memorial Hospital accept Medicare?
- John T. Mather Memorial Hospital is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Who is the authorized official for John T. Mather Memorial Hospital?
- The authorized official listed on John T. Mather Memorial Hospital's NPPES record is Christine Livreri, Avp. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is John T. Mather Memorial Hospital's NPI active?
- Yes — John T. Mather Memorial Hospital's NPI (1467249334) is active in the NPPES registry as of the last update on 2025-04-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.