Port Jefferson, NY 11777 (631) 473-1320
Our areas of expertise
Orthopedics
Our commitment to excellence in orthopedic care reinforces our reputation as a leader in the field.
Bariatric Surgery
Ranked among the best hospitals in the nation by Healthgrades for bariatric surgery.
Heart Care
Our expert team provides advanced, compassionate heart care close to home.
Neurosciences
A collaborative approach to providing care for brain and spine conditions.
Elevating Care Beyond Expectations
We’re elevating care beyond expectations by combining compassionate, personalized care with nationally recognized clinical experience. Ranked in the top 5% of hospitals nationwide by Healthgrades and consistently earning five stars from Medicare for quality care, Mather Hospital goes above and beyond to deliver exceptional outcomes for you.
With 24 ‘A’ grades in patient safety from The Leapfrog Group and Magnet® recognition for nursing excellence, Mather Hospital is recognized for care that meets the highest standards. As part of Northwell Health, we connect you to top specialists, bringing the best care right to your neighborhood—exceeding expectations and raising the health of our community.
In the News
Mather Hospital scores rare Healthgrades trifecta in 2026 Patient Care Honors
May 28, 2026Northwell’s Mather Hospital is the recipient of the 2026 Healthgrades Outstanding Patient Experience Award™ reflecting on sustained excellence in patient-centered care, safety, and clinical quality. Mather Hospital earned a rare “trifecta” of 2026 Healthgrades honors, receiving the Outstanding Patient Experience Award™, Patient S ...
Mather Hospital helps fight skin cancer with sunscreen lotion dispensers
June 9, 2026Northwell’s Mather Hospital is expanding its commitment to community skin cancer prevention by once again providing free SPF 30 sunscreen dispensers throughout the area. In partnership with Port Jefferson Village and Brookhaven Town, the hospital sponsored dispensers at beaches, parks, pools and other popular outdoor gathering spots ...
Mather Hospital unveils new fleet of daVinci 5 robots
June 2, 2026Northwell’s Mather Hospital today announced a significant investment in patient care with a complete upgrade to the da Vinci 5 robotic surgery system. This fleet replacement positions Mather Hospital at the forefront of surgical innovation, delivering a new era of precision, efficiency, and advanced patient care. The da Vinci 5, Intuitiv ...
Frey Family Emergency Department Virtual Tour
Mather Hospital is reimagining emergency care for our community. Take a virtual tour of our new state-of-the-art Emergency Department. Built from the ground up, this 29,000 square foot facility is equipped to provide exceptional care to our community!
Mather Hospital helps fight skin cancer with sunscreen lotion dispensers
June 9, 2026Northwell’s Mather Hospital is expanding its commitment to community skin cancer prevention by once again providing free SPF 30 sunscreen dispensers throughout the area. In partnership with Port Jefferson Village and Brookhaven Town, the hospital sponsored dispensers at beaches, parks, pools and other popular outdoor gathering spots ...
Mather Hospital unveils new fleet of daVinci 5 robots
June 2, 2026Northwell’s Mather Hospital today announced a significant investment in patient care with a complete upgrade to the da Vinci 5 robotic surgery system. This fleet replacement positions Mather Hospital at the forefront of surgical innovation, delivering a new era of precision, efficiency, and advanced patient care. The da Vinci 5, Intuitiv ...
Our Commitment to Excellence is Reflected in Our Achievements
As one of Americas 250 Best Hospitals, we’re setting a new standard for quality care nationwide.
Superior clinical outcomes and exceptional patient experience.
Rated as high performing by U.S. News & World Report.
Recognized for quality patient care, nursing excellence and innovations in professional nursing practice.