Baystate Health

Baystate Health is a non-profitintegratedhealthcare system headquartered in Springfield, Massachusetts, primarily serving Western Massachusetts. The system comprises four acute-care hospitals encompassing over 1,000 licensed beds; a multi-specialty group, Baystate Medical Practices, which includes over 700 physicians across 40 care locations; and a health maintenance organization (HMO), Health New England, which covers residents of parts of Massachusetts, Connecticut, New York, Vermont, and New Hampshire. The system's flagship hospital, Baystate Medical Center, serves as the only Level I trauma center in Western Massachusetts.

In 2022, Baystate's four hospitals reported a total of over 55,000 discharges and over 185,000 emergency department visits. A fifth, the former Baystate Mary Lane Hospital in Ware, was demolished in August 2025, two years after its closure.

In 2026 Baystate entered into a definitive agreement (pending regulatory approval) to integrate Mercy Medical Center as Baystate Mercy Hospital into the Baystate hierarchy, along with several other Mercy locations.. Once completed, this would bring the number of hospitals back up to 5.