The Springfield metro's hospitals after the deal
The three-county Springfield metro has 13 licensed hospitals in our data. Baystate now operates 5 of them: Baystate Medical Center, Baystate Mercy, Baystate Franklin, Baystate Noble and Baystate Wing. It is also a partner in Valley Springs Behavioral Health Hospital in Holyoke, a joint venture with Lifepoint.
From two in three discharges to more than three in four
Before the deal Baystate's hospitals handled 67.1% of the metro's inpatient discharges and Mercy 10.0%. Together they hold 77.1%. The next largest hospitals are Holyoke Medical Center at 8.8% and Cooley Dickinson Hospital in Northampton, part of Mass General Brigham, at 6.8%.
What moved to Baystate, and what Trinity kept
- To Baystate: Mercy Medical Center, Mercy Rehabilitation Hospital, the Greater Springfield MRI and Western Mass PET/CT joint ventures, and Mercy's medical groups.
- Kept by Trinity Health Of New England: Brightside for Families and Children, Mercy LIFE, Mary's Meadow at Providence Place, Beaven Kelly Home and Saint Luke's Home.
How we measured it
Discharges are all-payer inpatient discharges from each hospital's latest Medicare cost report. The market is the three counties of the Springfield metro. A joint venture counts with each partner. Baystate Children's Hospital is part of Baystate Medical Center's license, so it is counted there.
Questions
How much of the Springfield market does Baystate hold after buying Mercy?
About 77% of inpatient discharges at hospitals in the Springfield, MA metro, up from about 67% before the deal. Mercy Medical Center accounted for about 10%.
Which Springfield-area hospitals are not part of Baystate?
Holyoke Medical Center (Valley Health Systems), Cooley Dickinson Hospital (Mass General Brigham), MiraVista Behavioral Health Center, Encompass Health Rehabilitation Hospital of Western Massachusetts and the state-run Western Massachusetts Hospital.
When did Baystate complete the Mercy acquisition?
The acquisition was completed on November 1, 2026, after a definitive agreement signed on April 28, 2026. Mercy Medical Center is now Baystate Mercy Hospital.