Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

John T. Mather Memorial Hospital

Organization Critical Care Medicine (Internal Medicine) Physician · NPI 1467249334

John T. Mather Memorial Hospital is a Critical Care Medicine (Internal Medicine) Physician in Port Jefferson, New York. Works from 14 locations. Registered with an NPI since 2025.

In the registry since
2025

Practice location Address checks out

75 N Country Rd
Port Jefferson, NY 11777-2119
Phone: (631) 473-1320
Fax: (631) 686-7972
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (13)

  • 500 Commack Rd Bldg E, Commack, NY 11725-5020 — (631) 473-1320
  • 100 Highlands Blvd Ste 101, Port Jefferson, NY 11777-2320 — (631) 473-1320
  • 625 Belle Terre Rd Ste 113, Port Jefferson, NY 11777-2316 — (631) 473-1320
  • 125 Oakland Ave Ste 303, Port Jefferson, NY 11777-2130 — (631) 473-1320
  • 200 Belle Terre Rd, Port Jefferson, NY 11777-1928 — (631) 473-1320
  • 170 N Country Rd Ste 3, Port Jefferson, NY 11777-2606 — (631) 473-1320
  • 70 N Country Rd Ste 205, Port Jefferson, NY 11777-2161 — (631) 473-1320
  • 70 N Country Rd Ste 302, Port Jefferson, NY 11777-2161 — (631) 473-1320
  • 100 Highlands Blvd Ste 303, Port Jefferson, NY 11777-2320 — (631) 473-1320
  • 100 Highlands Blvd Ste 201, Port Jefferson, NY 11777-2320 — (631) 473-1320
  • 125 Oakland Ave Ste 301, Port Jefferson, NY 11777-2130 — (631) 473-1320
  • 625 Belle Terre Rd Ste 204, Port Jefferson, NY 11777-2318 — (631) 473-1320
  • 5225 Nesconset Hwy, Port Jefferson Station, NY 11776-2053 — (631) 473-1320

Specialties & licences

Critical Care Medicine (Internal Medicine) Physician (primary) Taxonomy 207RC0200X

Record details

NPI number1467249334
Entity typeOrganization (Type 2)
Organization subpartNo
Authorized official Christine Livreri — Avp · (631) 473-1320
NPI enumeratedApril 23, 2025
Last updated in NPPESApril 23, 2025
Certification dateApril 23, 2025
Mailing address75 N Country Rd, Port Jefferson, NY 11777-2119

Other providers in Port Jefferson