| WESTCHESTER HEALTH MEDICAL MANAGEMENT SERVICES ORGANIZATION, LLCLocation not reported, CT · Active | Location not reported, CT | LLC | Jan 27, 2017 | Active |
| WESTCHESTER HEALTH MEDICAL, P.C.Location not reported, CT · Active | Location not reported, CT | Corporation | Jan 27, 2017 | Active |
| HEALTH QUEST SYSTEMS, INC.Location not reported, CT · Active | Location not reported, CT | Corporation | Jun 26, 2017 | Active |
| PUTNAM HOSPITAL CENTER, INC.Location not reported, CT · Active | Location not reported, CT | Corporation | Oct 30, 2017 | Active |
| NORTHERN DUTCHESS HOSPITAL, INC.Location not reported, CT · Active | Location not reported, CT | Corporation | Oct 30, 2017 | Active |
| NORTH SHORE - LIJ MEDICAL, P.C.Location not reported, CT · Active | Location not reported, CT | Corporation | May 17, 2018 | Active |
| NORTH SHORE-LIJ ANESTHESIOLOGY, P.C.Location not reported, CT · Active | Location not reported, CT | Corporation | Feb 7, 2019 | Active |
| NUVANCE HEALTH INC.Location not reported, CT · Active | Location not reported, CT | Corporation | Jul 1, 2019 | Active |
| Northwell Healthcare, Inc.Location not reported, CT · Active | Location not reported, CT | Corporation | Mar 10, 2022 | Active |
| NORTH SHORE UNIVERSITY HOSPITAL CORP.Location not reported, CT · Active | Location not reported, CT | Corporation | Jun 24, 2022 | Active |
| NORTHWELL FLEXSTAFF, INC.Location not reported, CT · Active | Location not reported, CT | Corporation | Jan 4, 2023 | Active |
| NORTH SHORE- LIJ URGENT CARE, P.C.Location not reported, CT · Active | Location not reported, CT | Corporation | Jan 20, 2023 | Active |
| True North Urgent Care of Connecticut, P.C.Location not reported, CT · Dissolved | Location not reported, CT | Corporation | Jan 23, 2023 | Dissolved |
| TRUE NORTH FLEXSTAFF, INC.Location not reported, CT · Active | Location not reported, CT | Corporation | Feb 2, 2023 | Active |
| Northwell Direct Medical of Connecticut, P.C.Location not reported, CT · Dissolved | Location not reported, CT | Corporation | Mar 24, 2023 | Dissolved |
| NORTHWELL DIRECT, INC.Location not reported, CT · Active | Location not reported, CT | Corporation | May 5, 2023 | Active |
| NORTHWELL HEALTH LABORATORIES CORPORATIONLocation not reported, CT · Active | Location not reported, CT | Corporation | May 6, 2024 | Active |
| TRUE NORTH HEALTHCARE CONSULTING, LLCLocation not reported, CT · Active | Location not reported, CT | LLC | Jul 10, 2024 | Active |
| NORTHWELL CT FLEXSTAFF, INC.Location not reported, CT · Active | Location not reported, CT | Corporation | Jan 7, 2025 | Active |
| SPORTS PHYSICAL THERAPY OCCUPATIONAL THERAPY, AND REHABILITATION SERVICES OF THE NORTH SHORE, P.L.L.C.Location not reported, CT · Active | Location not reported, CT | LLC | Jul 13, 2026 | Active |