| 1982 | Norwood/Southwood formed Neponset Valley
Health System |
| 1984 | Providence/Mercy/Farren Memorial formed
Providence Systems, now Sisters of Providence Health System |
| 1985 | Cardinal Cushing/St. Elizabeth's/St. John
of God/St. Margaret's Hospital for Women
formed Caritas Christi |
| 1985 | Franklin Medical Center with Baystate
Health Systems, parent of Baystate Medical Center |
| 1986 | Bon Secours, now Holy Family Hospital and
Medical Center, with Caritas Christi |
| 1986 | Fairview with Berkshire Health Systems,
parent of Berkshire Medical Center |
| 1990 | Saint Vincent with Fallon Community
Health Plan |
| 1990 | Shaughnessy-Kaplan Rehabilitation with
Charter Health Services Corp., (now
North Shore Medical Center, Inc.),
parent of Salem Hospital |
| 1991 | Mary Lane with Baystate Health
Systems |
| 1993 | Cooley Dickinson with
Mary Hitchcock Memorial (Lebanon, NH) |
| 1993 | Nashoba Community, now Deaconess-Nashoba,
with New England Deaconess Hospital Corp., parent of Deaconess
Hospital |
| 1994 | Glover Memorial, now
Deaconess-Glover, with New England Deaconess Hospital Corp., parent of Deaconess
Hospital |
| 1994 | Mass. General/Brigham and Women's formed
Partners HealthCare System |
| 1994 | New England Deaconess Hospital Corp./New England Baptist formed Pathway
Health Network |
| 1994 | St. Anne's with Caritas Christi |
| 1994 | Cape Ann Health Systems, parent of Addison
Gilbert Hospital, with Northeast Health Systems, parent of Beverly
Hospital |
| 1995 | WalthamWeston, now
Deaconess-Waltham, with Pathway Health Network |
| 1995 | Marlborough Hospital with UMass Health System |
| 1996 | Southern New Hampshire Regional Medical
Center (Nashua, NH), with Lahey Hitchcock Clinic |
| 1996 | Clinton Hospital with UMass Health System |
| 1996 | Wing Memorial Hospital & Medical
Center with UMass Health System |
| 1996 | North Shore Medical Center joined Partners
HealthCare System |
| 1997 | New
England Medical Center joined Lifespan Health Care System |
| 1997 | Atlanticare Medical Center with North
Shore Medical Center (which is with Partners) |
| 1998 | HealthAlliance and UMass Memorial Health Care,
Inc. |
| 1998 | Faulkner Hospital, Brigham and Women's
Hospital, and Partners HealthCare System |
| 1999 | Newton-Wellesley with Partners HealthCare
System |
| 1999 | Good Samaritan with
Caritas Christi Healthcare System |
| 1999 | Quincy Hospital with Boston Medical
Center |
| 2001 | Nashoba Valley Medical
Center ownership transferred to Essent Healthcare |
| 2001 | Hale Hospital (new name Merrimack Valley
Hospital) ownership transferred to Essent Healthcare |
| 2006 | New England Rehabilitation Hospital
ownership transferred to Five Star Quality Care, Inc. from HEALTHSOUTH
Corporation |
| 2006 | Braintree
Rehabilitation Hospital ownership transferred to Five Star Quality Care,
Inc. from HEALTHSOUTH
Corporation |
| 2009 | Youville
Rehabiliation Hospital ownership transferred to Spaulding
Rehabilitation Network from Covenant Health Systems |
| 2010 | Caritas Christi Health Care
System ownership transferred to Steward Health Care System,
LLC |
| 2010 | Carney Hospital ownership
transferred to Steward Health Care System, LLC from Caritas Christi
Health Care System |
| 2010 | Good
Samaritan Medical Center ownership transferred to Steward Health Care
System, LLC from Caritas Christi Health Care System |
| 2010 | Holy Family Hospital & Medical Center
ownership transferred to Steward Health Care System, LLC from Caritas
Christi Health Care System |
| 2010 | Norwood Hospital ownership transferred to
Steward Health Care System, LLC from Caritas Christi Health Care
System |
| 2010 | Saint Anne's Hospital
ownership transferred to Steward Health Care System, LLC from Caritas
Christi Health Care System |
| 2010 | St. Elizabeth's Medical Center ownership
transferred to Steward Health Care System, LLC from Caritas Christi
Health Care System |
| 2011 | Nashoba
Valley Medical Center ownership transferred to Steward Health Care
System, LLC from Essent Healthcare |
| 2011 | Merrimack Valley Hospital ownership
transferred to Steward Health Care System, LLC from Essent
Healthcare |
| 2011 | Morton Hospital
and Medical Center, Inc.ownership transferred to Steward Health Care
System, LLC |
| 2011 | Quincy Medical
Center, Inc. ownership transferred to Steward Health Care System,
LLC |