| MA | Massachusetts Health Policy Commission | Wellforce, Inc.; Home Health Foundation, Inc. | No NO_CMIR | 2018-08-01 | Agency page |
| MA | Massachusetts Health Policy Commission | South Shore Health System, Inc.; Health Express, LLC | No NO_CMIR | 2018-07-23 | Agency page |
| MA | Massachusetts Health Policy Commission | Partners HealthCare System; Cooley Dickinson Physician Hospital Organization | No NO_CMIR | 2018-06-15 | Agency page |
| MA | Massachusetts Health Policy Commission | Shields Health Care; Tufts Medical Center | No NO_CMIR | 2018-01-08 | Agency page |
| MA | Massachusetts Health Policy Commission | Shields Health Care; Hallmark Health System; Tufts Medical Center Physicians Organization | No NO_CMIR | 2018-01-05 | Agency page |
| MA | Massachusetts Health Policy Commission | AdCare Hospital of Worcester, Inc. | No NO_CMIR | 2017-10-25 | Agency page |
| MA | Massachusetts Health Policy Commission | UMass Memorial Health Care; Harrington Memorial Hospital | No NO_CMIR | 2017-10-19 | Agency page |
| MA | Massachusetts Health Policy Commission | Shields Health Care Group; Baystate Health | No NO_CMIR | 2017-10-16 | Agency page |
| MA | Massachusetts Health Policy Commission | Community Health Systems; Steward Health Care System Note: *Withdrawn (Steward Health Care System) | No NO_CMIR | 2017-09-18 | Agency page |
| MA | Massachusetts Health Policy Commission | Steward Health Care System; IASIS Healthcare Corporation | No NO_CMIR | 2017-09-18 | Agency page |
| MA | Massachusetts Health Policy Commission | Community Health Care, Inc. | No NO_CMIR | 2017-08-09 | Agency page |
| MA | Massachusetts Health Policy Commission | CareGroup; Lahey Health System; Seacoast Regional Health Systems; Beth Israel Deaconess Care Organization; Mount Auburn Cambridge Independent Practice Association | Yes CMIR_INITIATED | 2017-07-13 | Agency page |
| MA | Massachusetts Health Policy Commission | Collaborative Care Holdings LLC; Reliant Medical Group, Inc. | No NO_CMIR | 2017-06-30 | Agency page |
| MA | Massachusetts Health Policy Commission | Quest Diagnostics Massachusetts; Cape Cod Healthcare | No NO_CMIR | 2017-06-28 | Agency page |
| MA | Massachusetts Health Policy Commission | Atrius Health, Inc.; Lowell General Hospital | No NO_CMIR | 2017-05-11 | Agency page |
| MA | Massachusetts Health Policy Commission | UMass Memorial Health Ventures (UMMHV); Team Behavioral Health | No NO_CMIR | 2017-04-05 | Agency page |
| MA | Massachusetts Health Policy Commission | Partners HealthCare System; Foundation of the Massachusetts Eye and Ear Infirmary | Yes CMIR_INITIATED | 2017-04-03 | Agency page |
| MA | Massachusetts Health Policy Commission | Atrius Health, Inc. | No NO_CMIR | 2017-02-01 | Agency page |
| MA | Massachusetts Health Policy Commission | Berkshire Health Systems | No NO_CMIR | 2017-01-17 | Agency page |
| MA | Massachusetts Health Policy Commission | Dana-Farber Cancer Institute; UMass Memorial Health Care, Inc. | No NO_CMIR | 2017-01-09 | Agency page |
| MA | Massachusetts Health Policy Commission | Alita Care; Bournewood Hospital | No NO_CMIR | 2017-01-04 | Agency page |
| MA | Massachusetts Health Policy Commission | New England Life Flight; Lahey Clinic Hospital | No NO_CMIR | 2016-12-06 | Agency page |
| MA | Massachusetts Health Policy Commission | Shields Health Care; Berkshire Medical Center | No NO_CMIR | 2016-11-30 | Agency page |
| MA | Massachusetts Health Policy Commission | ATI Physical Therapy; UMass Memorial Health Ventures (UMMHV) | No NO_CMIR | 2016-11-09 | Agency page |
| MA | Massachusetts Health Policy Commission | Steward Health Care Network; Central Massachusetts Independent Physician Association | No NO_CMIR | 2016-11-04 | Agency page |
| MA | Massachusetts Health Policy Commission | Clinton Hospital; HealthAlliance Hospitals | No NO_CMIR | 2016-10-07 | Agency page |
| MA | Massachusetts Health Policy Commission | Southcoast Health Network LLC | No NO_CMIR | 2016-09-30 | Agency page |
| MA | Massachusetts Health Policy Commission | Partners HealthCare System; Wentworth-Douglass Health System | No NO_CMIR | 2016-09-09 | Agency page |
| MA | Massachusetts Health Policy Commission | Southcoast Hospitals Group, Inc.; Care New England Health System Note: *Withdrawn (Care New England Health System) | No NO_CMIR | 2016-08-26 | Agency page |
| MA | Massachusetts Health Policy Commission | The Pediatric Physicians' Organization at Children's, LLC | No NO_CMIR | 2016-08-19 | Agency page |
| MA | Massachusetts Health Policy Commission | Hallmark Health Corporation; Wellforce, Inc. | No NO_CMIR | 2016-08-12 | Agency page |
| MA | Massachusetts Health Policy Commission | Hallmark Health PHO, Inc.; New England Quality Care Alliance, Inc. | No NO_CMIR | 2016-08-12 | Agency page |
| MA | Massachusetts Health Policy Commission | Boston Children's Hospital; South Shore Medical Center | No NO_CMIR | 2016-08-04 | Agency page |
| MA | Massachusetts Health Policy Commission | Atrius Health, Inc.; Winchester Hospital | No NO_CMIR | 2016-05-10 | Agency page |
| MA | Massachusetts Health Policy Commission | Kindred Healthcare; Curahealth | No NO_CMIR | 2016-05-06 | Agency page |
| MA | Massachusetts Health Policy Commission | Boston Children's Hospital; Southcoast Hospitals Group | No NO_CMIR | 2016-04-12 | Agency page |
| MA | Massachusetts Health Policy Commission | Belmont Medical Associates; Mount Auburn Professional Services, Inc. | No NO_CMIR | 2016-03-31 | Agency page |
| MA | Massachusetts Health Policy Commission | MWA, P.C. d/b/a RiverBend Medical Group; Sisters of Providence Health System, Inc. | No NO_CMIR | 2016-03-01 | Agency page |
| MA | Massachusetts Health Policy Commission | Baystate Mary Lane Hospital; Baystate Wing Hospital | No NO_CMIR | 2016-02-05 | Agency page |
| MA | Massachusetts Health Policy Commission | Mount Auburn Hospital; Mount Auburn Cambridge Independent Practice Association, Inc.; Boston Children's Hospital | No NO_CMIR | 2016-01-26 | Agency page |
| MA | Massachusetts Health Policy Commission | Beth Israel Deaconess Medical Center; Harvard Medical Faculty Physicians at Beth Israel Deaconess Medical Center; MetroWest Medical Center | Yes CMIR_INITIATED | 2016-01-14 | Agency page |
| MA | Massachusetts Health Policy Commission | Partners HealthCare System; Shields Health Care Group | No NO_CMIR | 2015-11-30 | Agency page |
| MA | Massachusetts Health Policy Commission | Atrius Health, Inc.; Massachusetts Eye and Ear Infirmary | No NO_CMIR | 2015-11-17 | Agency page |
| MA | Massachusetts Health Policy Commission | MetroWest Medical Center; Beth Israel Deaconess Care Organization | Yes CMIR_INITIATED | 2015-10-30 | Agency page |
| MA | Massachusetts Health Policy Commission | UMass Memorial Accountable Care Organization Note: *Withdrawn (UMass Memorial Accountable Care Organization) | No NO_CMIR | 2015-10-19 | Agency page |
| MA | Massachusetts Health Policy Commission | Anna Jaques Hospital; Shields Health Care Group | No NO_CMIR | 2015-10-13 | Agency page |
| MA | Massachusetts Health Policy Commission | Beth Israel Deaconess Care Organization; New England Baptist Clinical Integration Organization; New England Baptist Hospital | Yes CMIR_INITIATED | 2015-10-02 | Agency page |
| MA | Massachusetts Health Policy Commission | Dana-Farber Cancer Institute; Partners HealthCare System; Berkshire Medical Center Note: *Partners HealthCare System has withdrawn from this transaction. | No NO_CMIR | 2015-09-24 | Agency page |
| MA | Massachusetts Health Policy Commission | Cape Cod Hospital; Tufts Medical Center Parent | No NO_CMIR | 2015-08-12 | Agency page |
| MA | Massachusetts Health Policy Commission | Trinity Health Corporation; Saint Francis Care | No NO_CMIR | 2015-07-31 | Agency page |