JOHN T. MATHER MEMORIAL HOSPITAL
NPI 1376642371
Psychiatry & Neurology - Psychiatry in Port Jefferson Station, NY

Q: What is John T. Mather Memorial Hospital's NPI number?

The NPI number for John T. Mather Memorial Hospital is 1376642371. It was assigned to this organization in the NPPES registry on September 22, 2006.

Q: What is John T. Mather Memorial Hospital's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Psychiatry, with taxonomy code 2084P0800X.

Active since September 22, 2006

75 N COUNTRY RD, PORT JEFFERSON STATION, NY 11777(631) 473-1320(631) 686-7972 Get Directions Write a Review

NPPES record last updated: January 4, 2023. Verified against the NPPES registry weekly; last sync: November 01, 2026.

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About John T. Mather Memorial Hospital NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

JOHN T. MATHER MEMORIAL HOSPITAL (NPI 1376642371) is a healthcare organization registered as a psychiatry in Port Jefferson Station, New York and active in the NPI registry since September 2006. The organization lists Joseph Wisnoski, Vice President Finance, as its authorized official.

NPPES Registry Identity

NPI1376642371

Entity TypeOrganization

Primary Taxonomy2084P0800X

Legal Business NameJOHN T. MATHER MEMORIAL HOSPITAL

Location Address75 N COUNTRY RDPort Jefferson Station, NY 11777-2119

Mailing AddressPo Box 6435Brattleboro, VT 05302-6435 · (631) 473-1320 · Fax (631) 686-7972

Phone(631) 473-1320

Fax(631) 686-7972

Organization SubpartNo

Authorized OfficialJoseph WisnoskiVice President Finance · (631) 473-1320

Enumeration DateSeptember 22, 2006

Last NPPES UpdateJanuary 4, 2023

NPPES CertifiedJanuary 4, 2023

✔ NPI 1376642371 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychiatry & Neurology · PsychiatryAllopathic & Osteopathic Physicians

Taxonomy Code2084P0800X

Definition

A Psychiatrist specializes in the prevention, diagnosis, and treatment of mental disorders, emotional disorders, psychotic disorders, mood disorders, anxiety disorders, substance-related disorders, sexual and gender identity disorders and adjustment disorders. Biologic, psychological, and social components of illnesses are explored and understood in treatment of the whole person. Tools used may include diagnostic laboratory tests, prescribed medications, evaluation and treatment of psychological and interpersonal problems with individuals and families, and intervention for coping with stress, crises, and other problems.

75 N COUNTRY RD, Port Jefferson Station, NY 11777

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Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

John T. Mather Memorial Hospital is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

232

Medicare enrollment records show 232 clinicians reassign Medicare billing to John T. Mather Memorial Hospital, 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

Nurse Practitioner70

Emergency Medicine62

Internal Medicine29

Psychiatry28

Critical Care (Intensivists)14

Hospitalist13

Diagnostic Radiology7

Pulmonary Disease3

6 other specialties6

Nearest to this location (20)

See all 232

Yasser Abdelbaki, M.D.

Internal Medicine

NPI 1790149771

75 N COUNTRY RD
Port Jefferson, NY 11777

(631) 473-1320

✔ PECOS✔ Accepts MedicareSame address

Mohamed Ahmed

Psychiatry

NPI 1912534652

75 N COUNTRY RD
Port Jefferson, NY 11777

(631) 473-1320

✔ PECOS✔ Accepts MedicareSame address

Catherine Audus

Nurse Practitioner

NPI 1346790755

75 N COUNTRY RD
Port Jefferson, NY 11777

(631) 473-1320

✔ PECOSSame address

Swagato Bhattacharyya, DO

Psychiatry

NPI 1720585458

75 N COUNTRY RD
Port Jefferson, NY 11777

(631) 686-2517

✔ PECOS✔ Accepts MedicareSame address

John Paul Blaber, M.D.

Emergency Medicine

NPI 1760625727

75 N COUNTRY RD
Port Jefferson, NY 11777

(631) 473-1320

✔ PECOS✔ Accepts MedicareSame address

Michelle Byrne, ANP

Nurse Practitioner

NPI 1750769808

75 N COUNTRY RD
Port Jefferson, NY 11777

(631) 473-1320

✔ PECOS✔ Accepts MedicareSame address

Bo Chao, M.D.

Internal Medicine

NPI 1659462695

75 N COUNTRY RD
Port Jefferson, NY 11777

(631) 473-1320

✔ PECOS✔ Accepts MedicareSame address

Tommy Chau

Hospitalist

NPI 1780876979

75 N COUNTRY RD
Port Jefferson, NY 11777

(631) 473-1320

✔ PECOS✔ Accepts MedicareSame address

Halyna Chykyda

Internal Medicine

NPI 1881073740

75 N COUNTRY RD
Port Jefferson, NY 11777

(631) 473-1320

✔ PECOS✔ Accepts MedicareSame address

Michael Destefano, M.D.

Psychiatry

NPI 1407200116

75 N COUNTRY RD
Port Jefferson, NY 11777

(631) 473-1320

✔ PECOS✔ Accepts MedicareSame address

Marina Dillon, FNP-C

Nurse Practitioner

NPI 1043057607

75 N COUNTRY RD
Port Jefferson Station, NY 11777

(631) 805-2150

✔ PECOS✔ Accepts MedicareSame address

Christopher Driscoll, DO

Emergency Medicine

NPI 1629697420

75 N COUNTRY RD
Port Jefferson, NY 11777

(631) 473-1320

✔ PECOS✔ Accepts MedicareSame address

Glen Granati, M.D.

Critical Care (Intensivists)

NPI 1467872739

MATHER HOSPITAL, 75 N COUNTRY RD
Port Jefferson, NY 11777

(631) 473-1320

✔ PECOS✔ Accepts MedicareSame address

Kenneth Hirsch, MD

Emergency Medicine

NPI 1972618296

75 N COUNTRY RD
Port Jefferson, NY 11777

(631) 476-2808

✔ PECOS✔ Accepts MedicareSame address

Jeffrey Kott, M.D.

Critical Care (Intensivists)

NPI 1871024505

75 N COUNTRY RD
Port Jefferson, NY 11777

(631) 473-1320

✔ PECOS✔ Accepts MedicareSame address

Kenny Lien, MD

Diagnostic Radiology

NPI 1780858860

75 N COUNTRY ROAD
Port Jefferson, NY 11777

(631) 476-2767

✔ PECOS✔ Accepts MedicareSame address

Bradley Minter, M.D.

Hospitalist

NPI 1578901542

75 N COUNTRY RD
Port Jefferson, NY 11777

(631) 686-7654

✔ PECOS✔ Accepts MedicareSame address

Michelle Price, MD

Diagnostic Radiology

NPI 1629080478

75 N COUNTRY RD
Port Jefferson, NY 11777

(631) 473-1320

✔ PECOS✔ Accepts MedicareSame address

Harinder Sawhney, MD

Hospitalist

NPI 1669518437

75 N COUNTRY RD
Port Jefferson, NY 11777

(631) 686-7654

✔ PECOS✔ Accepts MedicareSame address

Susan Emanuele, M.D.

Hematology/Oncology

NPI 1902965163

75 N COUNTRY RD
Port Jefferson, NY 11777

(631) 686-7654

✔ PECOS✔ Accepts MedicareSame address

See all 232 clinicians

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 1376642371. It was assigned to this organization in the NPPES registry on September 22, 2006.

Where is John T. Mather Memorial Hospital located?

John T. Mather Memorial Hospital is located at 75 N Country Rd, Port Jefferson Station, 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 Psychiatry & Neurology, specializing in Psychiatry, with taxonomy code 2084P0800X.

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 January 4, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.