Trinity Health
Trinity Health is a large United States not-for-profit Catholic health system providing hospital, outpatient, home-based, hospice, senior-living, and other continuing-care services.
Last updated August 26, 2026
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Overview
Trinity Health is a United States not-for-profit Catholic health system sponsored by Catholic Health Ministries. Based in Livonia, Michigan, it operates a broad network of hospitals and continuing-care organizations across the country. The system's activities extend beyond acute inpatient care to outpatient clinics, home health, hospice, Programs of All-Inclusive Care for the Elderly (PACE), senior living, long-term care, and other community-based services. The organization was created in May 2000 through the merger of Holy Cross Health System, based in South Bend, Indiana, and Mercy Health Services, based in Farmington Hills, Michigan. At formation, the combined system brought together 25 health ministries in seven states and had approximately 45,000 employees and 7,000 physicians. Its initial footprint included acute-care hospitals, outpatient facilities, long-term-care locations, home-health offices, and hospice programs. The headquarters were first located in Farmington Hills and later moved to Novi before the organization established its current base in Livonia. Trinity Health expanded substantially during the following decade. A major organizational turning point came in 2013, when Trinity Health merged with Catholic Health East. The combination created a larger national Catholic health platform and extended Trinity's presence across additional states and regional markets. The system later acquired St. Mary's Hospital in Waterbury, Connecticut, in 2015. It also created Trinity Health Mid-Atlantic in 2018 with three other hospitals, supporting a more integrated regional operating structure. Trinity Health's facilities are guided by the Catholic identity of the organization and by the Ethical and Religious Directives for Catholic Health Care Services issued by the United States Conference of Catholic Bishops. These directives influence institutional policies and decisions concerning the delivery of care, reproductive services, end-of-life issues, partnerships, and other ethically sensitive matters. Healthcare ministries associated with the system include communities and congregations such as the Sisters of Mercy of the Americas, the Sisters of the Holy Cross, the Franciscan Sisters of Allegany, the Sisters of Providence of Holyoke, and the Sisters of St. Joseph of St. Augustine. The system has also used divestitures and affiliations to reshape its portfolio. In 2015, it transferred three financially challenged facilities to Prime Healthcare Services: St. Joseph Mercy Port Huron Hospital in Michigan, Mercy Suburban Hospital in Pennsylvania, and Saint Michael's Medical Center in New Jersey. Trinity also maintained a major relationship with BayCare Health System in Florida. In June 2024, a definitive agreement transferred full ownership of BayCare's member hospitals and related facilities to BayCare and ended Trinity Health's position as a corporate member. BayCare announced that the affected facilities would retain their Catholic identity. The reference material describes Trinity Health as operating 92 hospitals in 22 states, together with 120 continuing-care locations, and employing more than 120,000 people, including approximately 5,300 physicians. Its scale, Catholic sponsorship, multi-state hospital network, and combination of acute and community-based services position it as one of the largest nonprofit healthcare systems in the United States.
History
Trinity Health was established in May 2000 through the merger of Holy Cross Health System of South Bend, Indiana, and Mercy Health Services of Farmington Hills, Michigan. The founding combination created a Catholic nonprofit system with 25 health ministries spread across California, Idaho, Indiana, Iowa, Maryland, Michigan, and Ohio. At launch, the organization reported about 45,000 employees and 7,000 physicians. Its operating platform included 47 acute-care hospitals, hundreds of outpatient facilities, long-term-care sites, home-health offices, and hospice programs. The headquarters initially operated from Farmington Hills and later moved to Novi, Michigan. The new system was already among the larger American hospital organizations at its formation. Its Catholic sponsorship shaped its governance and service philosophy, while its operating model combined hospital ministries with ambulatory and continuing-care services. Rather than functioning solely as a hospital chain, Trinity developed as an integrated health system covering multiple points in the patient journey, including inpatient treatment, outpatient care, home health, hospice, long-term care, and senior living. A decisive expansion occurred in 2013, when Trinity Health merged with Catholic Health East. The transaction substantially increased the system's geographic reach and consolidated two large Catholic healthcare networks under one organization. The enlarged Trinity platform subsequently continued to expand and reorganize its regional presence. In 2015, it acquired St. Mary's Hospital in Waterbury, Connecticut. During the same year, it divested three financially challenged facilities to Prime Healthcare Services: St. Joseph Mercy Port Huron Hospital, Mercy Suburban Hospital in East Norriton Township, Pennsylvania, and Saint Michael's Medical Center in Newark, New Jersey. These transactions illustrate the system's use of acquisitions and divestitures to adjust local market participation and financial exposure. By 2018, the reference material described Trinity Health as reaching 22 states, with 94 acute-care hospitals and revenue of $18.3 billion for the year. It reported total assets of $26.2 billion and operating income of $401.3 million for that period. In September 2018, Trinity created Trinity Health Mid-Atlantic with three other hospitals, giving its facilities in that region a more coordinated organizational framework. The system's broader network was also described as including 120 continuing-care locations and more than 120,000 employees, including approximately 5,300 physicians. Trinity's Catholic identity remains central to its institutional framework. Its hospitals follow the Ethical and Religious Directives for Catholic Health Care Services issued by the United States Conference of Catholic Bishops. The directives provide a religious and ethical framework for clinical and organizational decisions and distinguish Trinity from secular and investor-owned healthcare operators. A number of religious communities and congregations contribute to the system's healthcare ministry, including the Sisters of Mercy of the Americas, Sisters of the Holy Cross, Franciscan Sisters of Allegany, Sisters of Providence of Holyoke, and Sisters of St. Joseph of St. Augustine. In 2024, Trinity's relationship with BayCare Health System changed materially. Trinity had held a 50.4 percent stake in BayCare until a definitive agreement dated June 27, 2024, under which BayCare paid $4.0 billion in cash and assumed full ownership of the member hospitals and other facilities previously associated with Trinity, including St. Anthony's Hospital and five St. Joseph's hospitals in the Tampa area. BayCare stated that the facilities would preserve their Catholic identity. This transaction reduced Trinity's direct ownership position in those Florida assets while preserving the religious character of the affected institutions. Today, Trinity Health is described as an active, national-scale nonprofit Catholic health system headquartered in Livonia, Michigan. Its brand encompasses hospitals, outpatient providers, physicians, home-care and hospice operations, PACE programs, senior living, and other continuing-care services. Its history reflects the consolidation of Catholic healthcare ministries, geographic expansion, selective divestiture, regional integration, and ongoing adjustment of ownership and affiliation structures.
- 2024
BayCare ownership transition
[1]An agreement transferred full ownership of BayCare's member hospitals and related facilities from the prior Trinity relationship to BayCare.
- 2018
Trinity Health Mid-Atlantic is established
[1]Trinity Health formed a Mid-Atlantic regional organization with three other hospitals.
- 2015
St. Mary's Hospital acquisition
[1]Trinity Health acquired St. Mary's Hospital in Waterbury, Connecticut.
- 2015
Three facility divestitures
[1]Trinity transferred St. Joseph Mercy Port Huron Hospital, Mercy Suburban Hospital, and Saint Michael's Medical Center to Prime Healthcare Services.
- 2013
Merger with Catholic Health East
[1]Trinity Health and Catholic Health East combined, significantly expanding the system's national Catholic healthcare footprint.
- 2000
Trinity Health is formed
[1]Holy Cross Health System and Mercy Health Services merged to form Trinity Health, initially bringing together 25 health ministries in seven states.
Products and positioning
A large, mission-driven Catholic nonprofit health system combining hospital care with outpatient, home-based, hospice, PACE, long-term-care, and senior-living services.
Hospital services
Acute-care hospitals
Trinity Health's hospital ministries provide inpatient and emergency care across a multi-state network. Hospitals may also offer surgery, diagnostic services, maternity care, cancer treatment, cardiovascular services, rehabilitation, and other specialty programs, although the precise service mix varies by facility.
Ambulatory healthcare
Outpatient and physician services
The system operates outpatient facilities and physician practices that extend care beyond the hospital setting. These services support primary care, specialty consultations, diagnostics, procedures, follow-up treatment, and coordinated access to Trinity's hospital ministries.
Continuing care
Home care and hospice
Trinity Health includes home-health and hospice programs intended to provide clinical, supportive, and end-of-life services in patients' homes or other community settings. These operations form part of the system's broader continuum-of-care model.
Community-based senior care
PACE
Programs of All-Inclusive Care for the Elderly are among Trinity Health's continuing-care activities. PACE combines medical and supportive services for eligible older adults and is designed to coordinate care in the community while addressing complex health and social needs.
Senior care
Senior living and long-term care
The organization operates or supports senior-living and long-term-care locations within its continuing-care network. These offerings cover residential, supportive, and extended-care needs and complement Trinity's hospital, rehabilitation, home-care, and hospice services.
Controversies
Brand decisions
2024
BayCare ownership and affiliation transitionM&ABackground
Trinity Health held a 50.4 percent stake in BayCare Health System and was its corporate member before the parties agreed to change the ownership structure.
Action taken
A definitive agreement transferred $4.0 billion in cash from BayCare and ended Trinity Health's corporate membership, while BayCare assumed full ownership of the relevant hospitals and facilities.
Aftermath
BayCare became the full owner of the affected facilities, including St. Anthony's Hospital and five St. Joseph's hospitals in Tampa, and stated that their Catholic identity would be maintained.
Cash consideration. $4.0 billion (June 27, 2024)
2018
Creation of Trinity Health Mid-AtlanticStrategyBackground
Trinity Health sought a more coordinated structure for its hospitals and healthcare activities in the Mid-Atlantic region.
Action taken
The organization formed Trinity Health Mid-Atlantic with three other hospitals.
Aftermath
The transaction created a regional operating platform within Trinity Health's wider multi-state system.
2015
Divestiture of three facilities to Prime HealthcareM&ABackground
Trinity Health identified three financially struggling facilities for transfer as part of a broader portfolio and operating restructuring.
Action taken
St. Joseph Mercy Port Huron Hospital, Mercy Suburban Hospital, and Saint Michael's Medical Center were sold or transferred to Prime Healthcare Services.
Aftermath
The transactions removed the three facilities from Trinity Health's operating portfolio and placed them under Prime Healthcare ownership.
Transaction values. $37.5 million for St. Joseph Mercy Port Huron Hospital; $35 million for Mercy Suburban Hospital; $62 million bankruptcy sale for Saint Michael's Medical Center (2015)
Recent events
Trinity Health patient data breach[2]
Reported:
Trinity Health said an unknown user downloaded files from a vendor's server on January 20, including patient information. Trinity Health said it was unaware of any misuse of the data.
Sources2 sources
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