Long Island hospitals face mixed results in fall patient safety report card

Hospitals on Long Island received a mix of top marks and troubling dips in the Fall 2025 Hospital Safety Grades released on Thursday by The Leapfrog Group.

Of the nearly two dozen Long Island hospitals rated, 11 earned A grades, seven received B’s and four got C’s. Stony Brook Eastern Long Island Hospital in Greenport landed the lowest grade among Nassau and Suffolk hospitals — a D.

Leapfrog, a national nonprofit that evaluates how well hospitals protect patients from preventable errors, injuries, accidents and infections, releases is Safety Grade report twice a year.

The report — now in its 25th year — assigns every general hospital in the United States a letter grade from A through F, based on 30-plus measures of patient safety.

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Fall 2025 Leapfrog safety grades — Long Island hospitals

Hospital	Town / City	Grade
Mather Hospital	Port Jefferson	A
St. Charles Hospital	Port Jefferson	A
South Shore University Hospital	Bay Shore	A
Peconic Bay Medical Center	Riverhead	A
St. Catherine of Siena Hospital	Smithtown	A
Huntington Hospital	Huntington	A
Plainview Hospital	Plainview	A
Glen Cove Hospital	Glen Cove	A
NYU Langone Hospital — Long Island	Mineola	A
Long Island Jewish Valley Stream	Valley Stream	A
St. Francis Hospital & Heart Center	Roslyn	A
NYU Langone Hospital — Suffolk	Patchogue	B
Stony Brook University Hospital	Stony Brook	B
Syosset Hospital	Syosset	B
Mercy Hospital	Rockville Centre	B
Mount Sinai South Nassau	Oceanside	B
North Shore University Hospital	Manhasset	B
Long Island Jewish Medical Center	New Hyde Park	B
Good Samaritan University Hospital	West Islip	C
Stony Brook Southampton Hospital	Southampton	C
St. Joseph Hospital	Bethpage	C
Nassau University Medical Center	East Meadow	C
Stony Brook Eastern Long Island Hospital	Greenport	D

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Officials at NYU Langone Health pointed to the Leapfrog ratings as proof of their commitment to patient safety and quality care.

““NYU Langone’s reputation in the communities we serve is built on a foundation of safe, top quality care, thanks to our teams who put their patients first every day,” said Dr. Alec Kimmelman, dean and CEO of NYU Langone Health. “Leapfrog is one of the best barometers patients can look to in determining where to receive their care, and we are proud of these ratings. This includes NYU Langone Hospital—Suffolk, where the pace of improvements has been extraordinary, thanks to the incredible teams working there.”

Northwell has 15 hospitals receive an A grade, including seven on Long Island.

“This recognition reflects the dedication of our entire workforce to the safety and well-being of our patients,” said Northwell Health President and CEO John D’Angelo. “We’re proud to see so many of our hospitals earn top marks from Leapfrog, which reinforces the system-wide culture of safety and quality that defines our care.”

This fall, Leapfrog also examined whether being part of a larger health system influences patient outcomes. The analysis found that 90 percent of hospitals nationwide are system-affiliated, and among those earning an A, the share rises to 94 percent — suggesting a possible link between system leadership and stronger safety performance.

The full list of national and regional results is available at hospitalsafetygrade.org.

_{Top: The entrance of Port Jefferson’s Mather Hospital, an affiliate of Northwell Health. Mather earned an A grade in Leapfrog’s fall Hospital Safety Grades report (courtesy photo taken by Jim Lennon).}