Quick answers
- Does John T Mather Memorial Hospital of Port Jefferson have an emergency room?
- Yes. Medicare (CMS) data lists emergency services at John T Mather Memorial Hospital of Port Jefferson. In a medical emergency, call 911.
- Where is John T Mather Memorial Hospital of Port Jefferson?
- 75 North Country Road, Port Jefferson, NY 11777, in Suffolk County, New York.
- What is the phone number of John T Mather Memorial Hospital of Port Jefferson?
- (631) 473-1320, as listed by Medicare (CMS).
- What is the Medicare star rating of John T Mather Memorial Hospital of Port Jefferson?
- 5 out of 5 stars in the CMS overall hospital quality rating (CMS data updated 2026-07-22).
Specialties and care areas[5]
- Orthopedics
- Heart Care
- Neurosciences
- Bariatric Surgery
- Behavioral Health Services
- Breast Health
- Critical Care
- Palliative Medicine
- Interventional Radiology
- Pain Management
Treatments[4][5]
- CyberKnife
- Hyperbaric Oxygen Therapy
- Cardiac Rehabilitation
- Pulmonary Rehabilitation
- Physical Therapy/Rehabilitation
- Respiratory Therapy
- Wound Treatment
- Infusion Center
- Bariatric surgery
Procedures[5]
- Hip Replacement
- Knee Replacement
- Shoulder Surgery
- Ankle Surgery
- Spine Surgery
- Weight Loss Surgery
- Gynecologic Surgeries
- Lung Cancer Screening
Programs and centers[5][7][8][9][10][11]
- Adult Partial Hospitalization
- Adolescent Partial Hospitalization
- Inpatient Adult Psychiatric Services
- Inpatient Adolescent Psychiatric Services
- Chemical Dependency Program
- Eating Disorders Program
- Epilepsy Monitoring Unit
- Sleep Disorders Center
- Lymphedema Program
- Medical Weight Management
- Transitional Care Unit
- Graduate Medical Education Program
- Robotically-assisted surgical programs
- Weiss Center for Pain Management
- Fortunato Breast Health Center
Emergency care (hospital website)[4][6][7]
| Emergency room | Yes |
|---|
Visiting and practical information
| Parking | Free valet parking at the front entrance, 7am to 7pm daily including weekends[12] |
|---|---|
| Patient portal | https://matherhospital.followmyhealth.com/Login/Home/Index?authproviders=0&returnArea=PatientAccess#/default |
Recognition[4][6]
- Healthgrades Outstanding Patient Experience Award (2026)
- Gold Level 1 Geriatric Emergency Department (ACEP)
Doctors and clinicians (868)
868 doctors and other clinicians list John T Mather Memorial Hospital of Port Jefferson as a hospital where they work, in Medicare's official clinician data (updated 2026-10-02). It is not a complete staff list.
Main specialties
- Diagnostic Radiology127
- Physician Assistant83
- Internal Medicine82
- Nurse Practitioner79
- Family Practice49
- Obstetrics/Gynecology42
- Cardiovascular Disease (Cardiology)36
- General Surgery23
- Gastroenterology21
- Hematology/Oncology21
- Neurology20
- Pathology19
Doctors with a page on this site (868)
- Abdul SattarHospitalist
- Abhay Malhotra, MDCardiovascular Disease (Cardiology)
- Abhishek Sadhu, MDInternal Medicine
- Abram R. Mozes, MDCardiac Electrophysiology
- Achraf A. Shamseddine, MDRadiation Oncology
- Adam F. Wos, MDEmergency Medicine
- Adam J. Kupersmith, MDCardiovascular Disease (Cardiology)
- Adam L. Evans, MDDiagnostic Radiology
- Adriana Guigova, DOHematology/Oncology
- Agnes Blau, MDNeurology
- Ahad Muzamil, PAPhysician Assistant
- Ahmad F. Bhatti, MDVascular Surgery
- Ahmel Arshad, DONeurology
- Ahsan Waqas, MDAnesthesiology
- Aitezaz Ahmed, MDRheumatology
- Ajay E. Chitkara, MDOtolaryngology
- Ajay V. Berdia, MDNeurology
- Alain M. Neri, NPNurse Practitioner
- Alan A. Johnson, MDDiagnostic Radiology
- Alan Ettinger, MDNeurology
- Albert N. Kim, MDUrology
- Aleksanser Vayntraub, MDRadiation Oncology
- Alex M. Aponte, MDFamily Practice
- Alexander C. Wong, MDDiagnostic Radiology
And 844 more: the button below opens the full list.
Names link to the doctor’s page on this site when there is one, otherwise to the official NPI Registry record (U.S. Department of Health and Human Services). Find a doctor · Source: CMS Facility Affiliation Data
Other emergency rooms nearby
Hospitals that list emergency services, by straight-line distance (not driving distance).
- St Charles Hospital0.7 mi · Port Jefferson, NY · Acute Care Hospital
- Suny/Stony Brook University Hospital4.0 mi · Stony Brook, NY · Acute Care Hospital
- St Catherine of Siena Hospital10 mi · Smithtown, NY · Acute Care Hospital
- Long Island Community Hospital13 mi · Patchogue, NY · Acute Care Hospital
- Northport VA Medical Center14 mi · Northport, NY · Federal/VA Acute Care Hospital
Other hospitals nearby
- Pilgrim Psychiatric Center16 mi · West Brentwood, NY · Psychiatric Hospital
Nursing homes, hospice, home health and dialysis nearby
Medicare-certified providers within 25 miles, by straight-line distance. Hospice and home health care is given at home: their address is the office.
Nursing homes
- Waters Edge at Port Jefferson for Rehabilitation a1.4 mi · Port Jefferson, NY · 2 of 5 stars
- John T Mather Memorial Hosp T C U1.6 mi · Port Jefferson, NY · 5 of 5 stars
- Allegria Nursing & Rehab Center of Port Jefferson3.4 mi · Port Jefferson Stati, NY · 1 of 5 stars
All nursing homes in the state →
Hospice providers
- NYU Langone Hospital - Suffolk Hospice14 mi · Patchogue, NY
- VNS and Hospice of Suffolk, Inc15 mi · East Northport, NY · 5 of 5 stars
- Mozaic Hospice16 mi · Bridgeport, CT
All hospice providers in the state →
Home health agencies
- Tender Loving Care, An Amedisys Company10 mi · Medford, NY
- Centerwell Home Health12 mi · Hauppauge, NY · 5 of 5 stars
- Gurwin Certified Home Health Agency14 mi · Commack, NY
All home health agencies in the state →
Dialysis facilities
- DCI - Stony Brook Kidney Center2.6 mi · East Setauket, NY · 4 of 5 stars
- Fms-Central Suffolk Akc3.1 mi · Port Jefferson Station, NY · 4 of 5 stars
- FMC Coram Dialysis Center6.0 mi · Centereach, NY · 4 of 5 stars
Outpatient surgery centers nearby
Medicare-certified ambulatory surgery centers within 25 miles, by straight-line distance.
- Northeast Endoscopy2.6 mi · E Setauket, NY
- Precisioncare Surgery Center2.6 mi · East Setauket, NY
- Advanced Surgery Center of Long Island3.1 mi · Port Jefferson Stati, NY
Community care nearby
Health centers, clinics, urgent care and pharmacies closest to this hospital, by straight-line distance, from official HRSA, Medicare and NPI Registry data. In a medical emergency, call 911.
Community health centers
- LISH at Port Jefferson Station1.9 mi · Port Jefferson Station, NY · Community health center
- Long Island Select Healthcare, Inc3.1 mi · Port Jefferson Station, NY · Community health center
- Sun River Health Elsie Owens Health Center7.2 mi · Coram, NY · Community health center
Clinics and urgent care
- City Medical of Upper East Side, PLLC3.1 mi · Port Jefferson Station, NY · Urgent care center
- Urgent Care of New York PLLC6.0 mi · Centereach, NY · Urgent care center
- City Medical of Upper East Side, PLLC6.2 mi · Selden, NY · Urgent care center
Pharmacies
- John T Mather Memorial Hospital0.0 mi · Port Jefferson, NY · Clinic pharmacy
- My CHS RX Inc.0.0 mi · Port Jefferson, NY · Community/retail pharmacy
- Belle Mead Pharmacy Inc2.6 mi · East Setauket, NY · Community/retail pharmacy
Assisted living nearby
Licensed homes from the official state licence list, by straight-line distance.
- Sunrise of East Setauket2.6 mi · East Setauket, NY
- The Bristal at Mount Sinai2.8 mi · Mount Sinai, NY
- Brightview Port Jefferson3.1 mi · Port Jefferson Station, NY
- Echo Arms Adult Home3.1 mi · Port Jefferson Station, NY
About the Medicare star rating
CMS (the federal Medicare agency) gives many hospitals an overall rating from 1 to 5 stars, based on measures of mortality, safety, readmissions, patient experience and timely care. It is one piece of information: ask your doctor what matters for your care. See the full Medicare profile →
Medicare quality data
What John T Mather Memorial Hospital of Port Jefferson reported to Medicare (CMS), the federal agency that publishes these results for hospitals nationwide. These are averages for many patients, not a prediction for any one person: ask your doctor what matters for your care. In a medical emergency, call 911.
What patients said (patient survey)
What this means: Patients who stayed overnight answered a national survey (HCAHPS) about their stay. More stars mean patients reported a better experience than at other hospitals. The percentages show how often patients gave the best answer, next to the national average.
| Summary star rating (all survey topics) | 4 of 5 stars |
|---|---|
| Overall rating of the hospital | 4 of 5 stars |
| Would recommend the hospital | 4 of 5 stars |
| Nurses communicated well | 4 of 5 stars |
| Doctors communicated well | 4 of 5 stars |
| Staff explained medicines | 3 of 5 stars |
| Information about recovery at home | 4 of 5 stars |
| Room and bathroom kept clean | 4 of 5 stars |
| Quiet at night | 3 of 5 stars |
| Rated the hospital 9 or 10 out of 10 | 75%National average: 72% |
| Would definitely recommend the hospital | 77%National average: 71% |
| Nurses “always” communicated well | 83%National average: 80% |
| Doctors “always” communicated well | 82%National average: 80% |
| Staff “always” explained medicines before giving them | 61%National average: 62% |
| Were given information about recovery at home | 89%National average: 86% |
| Room and bathroom “always” clean | 80%National average: 74% |
| Area around the room “always” quiet at night | 58%National average: 60% |
| Completed surveys | 552Response rate: 25% |
Source: Patient survey (HCAHPS) - Hospital — CMS, released July 22, 2026; patients discharged October 2024 to September 2025.
Infections caught in the hospital
What this means: CMS compares the number of infections patients caught in this hospital with the number expected for a hospital like it. The number shown is that ratio: below 1 means fewer infections than expected, above 1 means more. “Better” or “worse” is shown only when the difference is clear in the data.
| Central line bloodstream infections (CLABSI) | 0.264No different from the national benchmark |
|---|---|
| Catheter-associated urinary tract infections (CAUTI) | 0.306No different from the national benchmark |
| Surgical site infections after colon surgery | 0.266No different from the national benchmark |
| Surgical site infections after abdominal hysterectomy | Not reported to Medicare |
| MRSA bloodstream infections | 0.717No different from the national benchmark |
| Clostridioides difficile (C. diff) intestinal infections | 0.099Better than the national benchmark |
Source: Healthcare Associated Infections - Hospital — CMS, released July 22, 2026; data from October 2024 to September 2025.
Complications and deaths
What this means: Death rates are the share of patients who died within 30 days of going into the hospital for that condition, adjusted for how sick they were. PSI-90 combines several serious complications (a lower number is better). “No different from the national rate” is the most common result and means the hospital is in line with hospitals nationwide.
| Deaths within 30 days: heart attack patients | 10.4% |
|---|---|
| Deaths within 30 days: heart failure patients | 8.9% |
| Deaths within 30 days: pneumonia patients | 9.4% |
| Deaths within 30 days: COPD patients | 7.4% |
| Deaths within 30 days: stroke patients | 9.7% |
| Deaths within 30 days: coronary bypass surgery (CABG) | Not reported to Medicare |
| Serious complications (patient safety indicator PSI-90) | 0.93No different from the national rate |
| Complications after hip or knee replacement | 2.7% |
Source: Complications and Deaths - Hospital — CMS, released September 10, 2026; data from July 2022 to June 2025.
Return visits to the hospital (readmissions)
What this means: The share of patients who had to be admitted to a hospital again within 30 days after going home, adjusted for how sick they were. A lower percentage is better.
| Returned to any hospital within 30 days (all patients) | Not reported to Medicare |
|---|---|
| Readmitted within 30 days: heart attack | 14.1% |
| Readmitted within 30 days: heart failure | 18.4% |
| Readmitted within 30 days: pneumonia | 15.8% |
| Readmitted within 30 days: COPD | 18% |
| Readmitted within 30 days: coronary bypass surgery | Not reported to Medicare |
| Readmitted within 30 days: hip or knee replacement | 5.5% |
Source: Unplanned Hospital Visits - Hospital — CMS, released September 10, 2026; data from July 2023 to June 2025.
Emergency room times and sepsis care
What this means: ER time is the middle (median) time from arriving at the emergency room to leaving it; busier ERs usually have longer times, so the ER volume is shown too. Leaving before being seen: a lower percentage is better. Sepsis is a life-threatening reaction to an infection; a higher percentage means more patients got every recommended early step.
| Emergency room volume (patients per year) | Medium (20,000–39,999) |
|---|---|
| Average (median) time patients spent in the emergency room before leaving (OP-18b) | 235 minutesNational average: 162 minutes |
| Patients who left the emergency room before being seen (OP-22) | 1%National average: 2% |
| Sepsis patients who got all the recommended early care (SEP-1) | 71%National average: 65% |
Source: Timely and Effective Care - Hospital — CMS, released July 22, 2026; data from January 2024 to December 2024.
ER wait times and Medicare ratings nearby
How this hospital compares with others in the area, ranked only by official Medicare (CMS) numbers.
Prices
We have not been able to read a price file for John T Mather Memorial Hospital of Port Jefferson yet. Every US hospital must publish its standard charges online (federal price transparency rule): look for “price transparency” or “standard charges” on the hospital’s website, or call the hospital and ask for an estimate. In a medical emergency, call 911.
Hospital information
| Hospital type | Acute Care Hospital |
|---|---|
| Address | 75 North Country Road, Port Jefferson, NY 11777 |
| County | Suffolk County |
| State | New York |
| Phone | (631) 473‑1320 |
| Emergency services | Yes |
| Ownership | Voluntary non-profit - Private |
| Medicare overall rating | 5 of 5 stars |
| CMS Certification Number | 330185 |
| Name in Medicare records | JOHN T MATHER MEMORIAL HOSPITAL OF PORT JEFFERSON |
| Profile level | Medicare data + hospital website |
| Name on the hospital’s website | Mather Hospital |
| Official website | matherhospital.org |
| Corrections | Report an error or suggest an update → |
Sources
- Hospital General Information — Centers for Medicare & Medicaid Services (CMS), data updated 2026-07-22, retrieved 2026-10-29
- Medicare Care Compare — official Medicare profile of this hospital
- U.S. Census Bureau ZIP code areas (Gazetteer) — approximate position (center of the ZIP code area) used for distances
From the hospital’s website
Numbers match the citations above. Checked 2026-10-30.
- Mather Hospital — matherhospital.org
- Care & Treatment — matherhospital.org
- Emergency Department — matherhospital.org
- Directions - Mather Hospital — matherhospital.org
- Cody Surgical Pavilion - Mather Hospital — matherhospital.org
- Fortunato Breast Health Center - Mather Hospital — matherhospital.org
- Weiss Center for Pain Management - Mather Hospital — matherhospital.org
- Main Hospital - Mather Hospital — matherhospital.org
- Valet Parking - Mather Hospital — matherhospital.org