Mass General Brigham

Mass General Brigham Inc. (MGB, formerly Partners HealthCare) is a not-for-profit, integrated health system based in Greater Boston. It operates two academic medical centers—Massachusetts General Hospital and Brigham and Women's Hospital—along with specialty and community hospitals, home care, urgent care, and a licensed health plan serving Massachusetts and southern New Hampshire. The system is a principal teaching affiliate of Harvard Medical School. In November 2019, Partners announced a five-year strategy and said it would rebrand as Mass General Brigham to present a unified identity across the system.

As of fiscal 2024, MGB reported about US$20.6 billion in operating revenue and a return to positive operating margin after pandemic-era losses. With roughly 82,000 employees, it has been described as the state’s largest private employer. The system has drawn regulatory scrutiny over costs and expansion: in January 2022 the Massachusetts Health Policy Commission ordered MGB to file the state’s first system-wide Performance Improvement Plan, and in December 2024 the HPC said the plan delivered “meaningful” cost-growth reductions.

From 2023, Boston cancer-care alignments shifted: Dana–Farber Cancer Institute announced it would end its adult inpatient oncology affiliation with Brigham and Women’s and build a freestanding adult cancer hospital with Beth Israel Deaconess Medical Center; state regulators approved the project in March 2025. In 2025 MGB undertook multi-wave nonclinical layoffs as part of a restructuring, and residents and fellows who unionized in 2023 ratified a first system-wide contract in May 2025.