Does John T Mather Memorial Hospital of Port Jefferson have an emergency room?

John T Mather Memorial Hospital of Port Jefferson provides emergency services.

What is the CMS star rating for John T Mather Memorial Hospital of Port Jefferson?

John T Mather Memorial Hospital of Port Jefferson has an overall rating of 5 out of 5 stars from the Centers for Medicare and Medicaid Services.

John T Mather Memorial Hospital of Port Jefferson

Q: What is the emergency room wait time at John T Mather Memorial Hospital of Port Jefferson?

Patients spend a median of 235 minutes (3 hours 55 minutes) in the emergency department at John T Mather Memorial Hospital of Port Jefferson, according to CMS. This is a median over a past 12-month reporting period, not a live figure.

Q: Where is John T Mather Memorial Hospital of Port Jefferson located?

John T Mather Memorial Hospital of Port Jefferson is at 75 N Country Rd, Port Jefferson, NY 11777.

Q: What is the phone number for John T Mather Memorial Hospital of Port Jefferson?

The phone number for John T Mather Memorial Hospital of Port Jefferson is (631) 473-1320.

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(631) 473-1320 Visit Website

Acute Care Hospitals

248Beds

Time ZoneEST
CountySuffolk
Emergency CapableYes
FIPS36103
Area Code631

Quality and performance

Centers for Medicare & Medicaid Services · data as of July 2026

Patients spend an average of 3 hours 55 minutes in the emergency department at John T Mather Memorial Hospital of Port Jefferson. That is 35 minutes longer than the New York average of 3 hours 20 minutes.

CMS rating ★★★★★ 5/5

Left before seen 1%

ER volume medium

Type Acute Care

Ownership Non-profit

Source: CMS Hospital General Information and Timely & Effective Care. Wait times are a median over a past 12-month reporting period, not live data. Not affiliated with CMS or with John T Mather Memorial Hospital of Port Jefferson. For a medical emergency, call 911.

Compare ER waits across New York · How we source this data · Something wrong on this page? Tell us

Closest other hospitals

0.6 mi St Charles Hospital Port Jefferson, NY 3 hr 48 min ER wait 3.8 mi University Hospital Stony Brook, NY 3 hr 43 min ER wait 3.9 mi University Hospital ( Stony Brook ) Stony Brook, NY 3 hr 43 min ER wait 10 mi St Catherine of Siena Hospital Smithtown, NY 3 hr 26 min ER wait 10 mi St Catherine of Siena Med Ctr Smithtown, NY No ER

All 2 hospitals in Port Jefferson →

John T Mather Memorial Hospital of Port Jefferson Address 75 N Country Rd
Port Jefferson, NY 11777

The information listed on this page will help you determine if John T Mather Memorial Hospital of Port Jefferson is the nearest hospital to your location. Address, phone number, emergency department status, bed count and CMS quality measures for John T Mather Memorial Hospital of Port Jefferson are listed above.