Northwell’s Mather Hospital has received a five-star rating from the Centers for Medicare & Medicaid Services (CMS) for the third year in a row. This is the highest rating possible and is based on data evaluating outcomes, patient experience, and processes. Only four hospitals on Long Island earned this top rating.
“Achieving a five-star rating once is a significant accomplishment. Maintaining it for three consecutive years is a testament to our dedicated staff and a relentless pursuit of providing the best possible care to our patients,” said Mather President Kevin McGeachy.
Other Northwell hospitals that also received five stars include Glen Cove Hospital, Huntington Hospital, Northern Westchester Hospital in Mount Kisco, and Sharon Hospital in Connecticut. These ratings are part of the 2025 CMS Star Quality Rating System, which used Care Compare data from 2020 to 2023. Nationally, only about 10 percent of the 4,609 star-rated hospitals achieved five-star status. Sharon Hospital was previously operated by Nuvance Health before Northwell completed its merger with Nuvance in May.
CMS operates under the Department of Health and Human Services and created the five-star system to help consumers identify healthcare facilities using quality metrics such as mortality rates, safety of care, readmissions, patient experience, and timely care.
Mather Hospital is an accredited non-profit community teaching hospital with 248 beds serving Suffolk County residents. The hospital has been recognized with Magnet status three times by the American Nurses Credentialing Center for quality patient care and nursing excellence. It was rated high performing by U.S. News & World Report in two specialties—gastroenterology and GI surgery as well as pulmonology and lung surgery—and for conditions including congestive heart failure, kidney failure, and pneumonia. Mather was also named one of America’s 250 best hospitals by Healthgrades for three consecutive years (2023-2025) and received Healthgrades’ Outstanding Patient Experience Award for the fifth straight year in 2025. In spring 2025, The Leapfrog Group awarded Mather its 22nd consecutive A grade for patient safety.
The hospital offers graduate medical education programs across several disciplines including internal medicine, radiology, pharmacy, psychiatry residency programs as well as fellowships in gastroenterology and hematology/oncology.
Northwell Health operates as the largest not-for-profit health system in the Northeast with 28 hospitals serving New York and Connecticut residents through more than 1,000 outpatient facilities. Northwell employs over 104,000 people—including physicians associated with Northwell Health Physician Partners and Nuvance Health Medical Practices—and cares for more than three million people annually across regions such as Long Island and western Connecticut.
