| Long Island Jewish Medical Center | 501(c)(3) | 1955 | $4.62 billion | $4.12 billion | 2024-12 |
| North Shore University Hospital | 501(c)(3) | 1965 | $3.86 billion | $3.89 billion | 2024-12 |
| Northwell Healthcare Inc | 501(c)(3) | 1994 | $2.69 billion | $8.49 billion | 2024-12 |
| Lenox Hill Hospital | 501(c)(3) | 1920 | $2.16 billion | $2.20 billion | 2024-12 |
| Staten Island University Hospital | 501(c)(3) | 1988 | $1.64 billion | $1.99 billion | 2024-12 |
| South Shore University Hospital | 501(c)(3) | 1933 | $1.20 billion | $1.17 billion | 2024-12 |
| Northwell Health Laboratories | 501(c)(3) | 1999 | $872.2 million | $213 million | 2024-12 |
| Huntington Hospital Association | 501(c)(3) | 1946 | $797.3 million | $867.3 million | 2024-12 |
| Northern Westchester Hospital Association | 501(c)(3) | 1938 | $594 million | $702 million | 2024-12 |
| John T Mather Memorial Hospital | 501(c)(3) | 1933 | $478.6 million | $477.2 million | 2024-12 |
| Phelps Memorial Hospital Association | 501(c)(3) | 1954 | $445 million | $594.8 million | 2024-12 |
| North Shore-Lij Anesthesiology PC | 501(c)(3) | 2017 | $442.8 million | $57.9 million | 2024-12 |
| Physicians of University Hospital PC | 501(c)(3) | 2010 | $375.9 million | $58.4 million | 2024-12 |
| Central Suffolk Hospital | 501(c)(3) | 1952 | $365.8 million | $333.4 million | 2024-12 |
| Plainview Hospital | 501(c)(3) | 1996 | $349.7 million | $177.7 million | 2024-12 |
| Glen Cove Hospital | 501(c)(3) | 1956 | $283.8 million | $216.3 million | 2024-12 |
| True North Medical Group PC | 501(c)(3) | 2014 | $212.3 million | $205.4 million | 2024-12 |
| Sports Physicaltherapy Occupational Therapy and Rehabilitation Service | 501(c)(3) | 2012 | $198.9 million | $118.6 million | 2024-12 |
| Northwell Health Foundation | 501(c)(3) | 1994 | $123.5 million | $572.8 million | 2024-12 |
| Clny Alliance Inc | 501(c)(3) | 2016 | $111.9 million | $11.8 million | 2024-12 |
| Long Island Jewish Medical Center at Home Pharmacy Inc | 501(c)(3) | 1996 | $105.5 million | $7.8 million | 2024-12 |
| Westchester Health Medical PC | 501(c)(3) | 2017 | $98.4 million | $24.9 million | 2024-12 |
| Brooklyn Ambulatory Care PC | 501(c)(3) | 2018 | $79.3 million | $3,747 | 2024-12 |
| Carnegie Cardiovascular PC | 501(c)(3) | 2017 | $79.1 million | $1.9 million | 2024-12 |
| Northwell Health Stern Family Center for Rehabilitation | 501(c)(3) | 1968 | $66.7 million | $38.9 million | 2024-12 |
| Medical Services of Bellmore PC | 501(c)(3) | 2024 | $53.8 million | $4.8 million | 2024-12 |
| Lakeville Surgery PC | 501(c)(3) | 2018 | $48.6 million | $191 | 2024-12 |
| Harbor View Medical Services PC | 501(c)(3) | 2013 | $37 million | $10.2 million | 2024-12 |
| Marcus Avenue Medical PC | 501(c)(3) | 2018 | $36.2 million | $35.3 million | 2024-12 |
| Southside Faculty Medical Affiliates University Faculty Prac | 501(c)(3) | 2022 | $33.6 million | $40.7 million | 2024-12 |
| Medical Care of Queens PC | 501(c)(3) | 2017 | $33.5 million | $11 million | 2024-12 |
| Lenox Hill Hospital Medical PC | 501(c)(3) | 2018 | $32.2 million | $2.5 million | 2024-12 |
| North Shore Health System Medical Faculty Group Practice Inc | 501(c)(3) | 2022 | $27.8 million | $23,286 | 2024-12 |
| North Shore-Lij Alliance Inc | 501(c)(3) | 2011 | $25.9 million | $9.5 million | 2024-12 |
| Peconic Cardiology PC | 501(c)(3) | 2017 | $25.8 million | $4.5 million | 2024-12 |
| North Shore-Lij Radiology Services P C | 501(c)(3) | 2017 | $25.2 million | $11.6 million | 2024-12 |
| North Shore-Lij Ob-Gyn at Garden City PC | 501(c)(3) | 2017 | $18.7 million | $14.1 million | 2024-12 |
| North Shore-Lij Internal Medicine at New Hyde Park PC | 501(c)(3) | 2018 | $15.1 million | $5.1 million | 2024-12 |
| North Shore-Lij Pediatrics of Suffolk County PC | 501(c)(3) | 2017 | $14.7 million | $6.7 million | 2024-12 |
| Medical Services of Setauket PC | 501(c)(3) | 2022 | $13.1 million | $2.6 million | 2024-12 |
| North Shore-Lij Ob-Gyn PC | 501(c)(3) | 2017 | $11.4 million | $5.7 million | 2024-12 |
| Medical Services of Kips Bay PC | 501(c)(3) | 2022 | $11.3 million | $20.4 million | 2024-12 |
| North Shore-Lij Cardiology at Deer Park PC | 501(c)(3) | 2014 | $10.8 million | $562,346 | 2024-12 |
| North Shore- Lij Medical Group at Huntington PC | 501(c)(3) | 2017 | $9.6 million | $9.3 million | 2024-12 |
| White Hall Dental PC | 501(c)(3) | 2024 | $9.6 million | $1.1 million | 2024-12 |
| Huntington Hospital Dolan Family Health Center Inc | 501(c)(3) | 1998 | $8.7 million | $27 million | 2024-12 |
| North Shore-Lij Internal Medicine PC | 501(c)(3) | 2014 | $8.5 million | $6.5 million | 2024-12 |
| North Shore-Lij Heart Surgery PC | 501(c)(3) | 2014 | $7.7 million | $1.5 million | 2024-12 |
| Medical Services of Uniondale PC | 501(c)(3) | 2022 | $7.6 million | $379,662 | 2024-12 |
| North Shore-Lij Internal Medicine at Lynbrook PC | 501(c)(3) | 2018 | $7.3 million | $2.7 million | 2024-12 |
| Staten Island University Hospital Foundation | 501(c)(3) | 2006 | $7.2 million | $38.6 million | 2024-12 |
| North Shore- Lij Medical Group at North Nassau PC | 501(c)(3) | 2018 | $7 million | $1.1 million | 2024-12 |
| Lenox Hill Pathology P C | 501(c)(3) | 2018 | $6.9 million | $422,901 | 2024-12 |
| Black Hall Dental PC | 501(c)(3) | 2024 | $6.9 million | $2.9 million | 2024-12 |
| North Shore-Lij Ob-Gyn at New Hyde Park PC | 501(c)(3) | 2018 | $6.8 million | $1.3 million | 2024-12 |
| North Shore-Lij Medical Group at Syosset PC | 501(c)(3) | 2018 | $6.6 million | $1.4 million | 2024-12 |
| Brightwaters Gynecology PC | 501(c)(3) | 2018 | $5.2 million | $351,474 | 2024-12 |
| Lenox Otolaryngology Head & Necksurgery PC | 501(c)(3) | 2018 | $5.1 million | $162,751 | 2024-12 |
| Medical Services of Lenox Hill PC | 501(c)(3) | 2024 | $4.9 million | $1.4 million | 2024-12 |
| Medical Services of Lynbrook PC | 501(c)(3) | 2022 | $4.7 million | $5.3 million | 2024-12 |
| Marcus Avenue Ob Gyn PC | 501(c)(3) | 2024 | $3.9 million | $6.1 million | 2024-12 |
| Vna Home Health Services Inc | 501(c)(3) | 1995 | $3.3 million | $981,502 | 2024-12 |
| Community Drive Surgery PC | 501(c)(3) | 2018 | $2.1 million | $1.1 million | 2024-12 |
| Medical Services of Nassau PC | 501(c)(3) | 2024 | $1.6 million | $16.4 million | 2024-12 |
| North Shore-Lij Occupational Medicine PC | 501(c)(3) | 2018 | $978,513 | $161,332 | 2024-12 |
| PKD Free Babies Alliance LTD | 501(c)(3) | 2021 | $657,659 | $1.3 million | 2025-12 |
| Virtual Health Medicine P C | 501(c)(3) | 2018 | $146,250 | $1 | 2024-12 |
| Hospice Care in Westchester and Putnam Inc | 501(c)(3) | 1997 | $112,000 | $15.8 million | 2024-12 |
| Northwell Health Medical NJ PC | 501(c)(3) | 2025 | $23,859 | $23,311 | 2024-12 |
| Association for Professionals in Infection CTRL & Epidemiology Inc | 501(c)(3) | 1975 | $0 | $0 | 2025-12 |
| Calverton Foundation Inc | 501(c)(3) | 2019 | $0 | $1 | 2024-12 |
| Glen Cove Faculty Medical Affiliates University Faculty Prac | 501(c)(3) | 2022 | $0 | $1 | 2024-12 |
| Heart Institute | 501(c)(3) | 2001 | $0 | $1 | 2024-12 |
| Huntington Faculty Medical Affiliates University Faculty Prac | 501(c)(3) | 2022 | $0 | $1 | 2024-12 |
| Lenox Hill Faculty Medical Affiliates University Faculty Prac | 501(c)(3) | 2022 | $0 | $1 | 2024-12 |
| Long Island Jewish Faculty Medical Affiliates University Faculty Prac | 501(c)(3) | 2022 | $0 | $1 | 2024-12 |
| Long Island Jewish Faculty Physicians University Facultypract | 501(c)(3) | 2026 | $0 | $1 | 2024-12 |
| Mather Faculty Medical Affiliates University Faculty Practice Corp | 501(c)(3) | 2022 | $0 | $1 | 2024-12 |
| Medical Services of Riverhead PC | 501(c)(3) | 2024 | $0 | $1 | 2024-12 |
| North Shore Faculty Medical Affiliates University Faculty | 501(c)(3) | 2022 | $0 | $1 | 2024-12 |
| North Shore- Lij Medical Group PC | 501(c)(3) | 2018 | $0 | $1 | 2024-12 |
| North Shore-Lij Health Plan Inc | 501(c)(3) | 2015 | $0 | $1 | 2025-09 |
| North Shore-Lij Health Plans Holding Company Inc | 501(c)(3) | 2015 | $0 | $201,000 | 2024-12 |
| North Shore-Lij Medical Group Urgent Medical Care PC | 501(c)(3) | 2014 | $0 | $1 | 2024-12 |
| North Shore-Lij Medical PC | 501(c)(3) | 2014 | $0 | $0 | 2024-12 |
| North Shore-Long Island Jewish Medical Care Centers Inc | 501(c)(3) | 2000 | $0 | $1 | 2024-12 |
| Northeastern Anathesia of New Jersey PC | 501(c)(3) | 2022 | $0 | $1.5 million | 2024-12 |
| Northwell Health Cancer Institute Inc | 501(c)(3) | 2025 | $0 | $1 | 2024-12 |
| Northwell Inc | 501(c)(3) | 2025 | $0 | $0 | 2024-12 |
| Northwell Proton Therapy PC | 501(c)(3) | 2018 | $0 | $1 | 2024-12 |
| Northwell Quality and Medical Affairs Inc | 501(c)(3) | 2019 | $0 | $1 | 2024-12 |
| Northwern Westchester Faculty Medical Affiliates University Facu | 501(c)(3) | 2022 | $0 | $1 | 2024-12 |
| Peconic Bay Faculty Medical Affiliates University Faculty Prac | 501(c)(3) | 2022 | $0 | $1 | 2024-12 |
| Phelps Faculty Medical Affiliates University Faculty Practice Corpor | 501(c)(3) | 2022 | $0 | $1 | 2024-12 |
| Phelps Faculty Physicians University Faculty Practice Corpor | 501(c)(3) | 2026 | $0 | $1 | 2024-12 |
| Plainview Faculty Medical Affiliates University Faculty Prac | 501(c)(3) | 2022 | $0 | $1 | 2024-12 |
| South Shore Faculty Medical Affiliates University Faculty Prac | 501(c)(3) | 2022 | $0 | $1 | 2024-12 |
| Staten Island Faculty Medical Affiliates- University Faculty Pra | 501(c)(3) | 2022 | $0 | $1 | 2024-12 |
| True North Health Management Inc | 501(c)(3) | 2019 | $0 | $1 | 2024-12 |
| True North Medical of Stony Brook P C | 501(c)(3) | 2024 | $0 | $1 | 2024-12 |
| True North Patient Safety Organization Inc | 501(c)(3) | 2019 | $0 | $1 | 2024-12 |
| Visiting Nurse Association of Hudson Valley | 501(c)(3) | 1938 | $0 | $268,717 | 2024-12 |
| Wellbridge Psychiatry P C | 501(c)(3) | 2019 | $0 | $1 | 2024-12 |