Adventist Health System/West, also known as Adventist Health System West, doing business as Adventist Health is a nonprofit organization affiliated with the Seventh-day Adventist Church headquartered in Roseville, California, that operates facilities in 3 states across the Western United States.
History In the 1960s, the church's General Conference transferred ownership of the hospitals in the United States to the local conferences. In 1972, the General Conference centralized the management of its healthcare facilities, creating Adventist Health Systems. The conferences then transferred the hospitals to the system, creating the entities Northwest Medical Foundation, and Adventist Health Services at the union level.
In 1980, they merged creating Adventist Health System/West, which changed its name to Adventist Health in 1995. The headquarters for Adventist Health was in Los Angeles, Adventist Health worried about the smaller hospitals being neglected, so the headquarters was moved to Roseville, California in 1982. In 2019, a new Roseville shared service center replaced the corporate office that opened in 1985.
In 2019, its headquarters was among six organizations awarded the Malcolm Baldrige National Quality Award for Performance Excellence.
In 2025, Adventist Health began offshoring 750 roles across IT, finance, HR, talent acquisition, and supply chain, while simultaneously implementing a return-to-office mandate affecting 800 employees.
On August 30, 2026, Adventist Health transitioned to EPIC at a cost of US$500M.
Hospitals Adventist Health operates twenty-seven hospitals, mostly in California: Hospital Beds Location Area served Founded Former names Acquired Adventist Health and Rideout 209 Marysville, California Yuba County 1907 Rideout Memorial Hospital 2018 Adventist Health Bakersfield 253 Bakersfield, California Kern County 1910 San Joaquin Community Hospital 1987 Adventist Health Castle 160 Kailua, Hawaii Windward Oʻahu Island 1963
― Adventist Health Clear Lake 25 Clearlake, California Eastern Lake County 1964
1997 Adventist Health Columbia Gorge 49 The Dalles, Oregon Wasco County 1901 Mid-Columbia Medical Center 2023 Adventist Health Delano 156 Delano, California Northern Kern County 1974 Delano Regional Medical Center 2020 Adventist Health Glendale 515 Glendale, California San Fernando Valley 1905
1973 Adventist Health Hanford 235 Hanford, California Kings County 1965
2010 Adventist Health Howard Memorial 25 Willits, California Northeastern Mendocino County 1928 Frank R. Howard Memorial Hospital 1986 Adventist Health Lodi Memorial 270 Lodi, California Northern San Joaquin County 1952 Lodi Memorial Hospital 2015 Adventist Health Mendocino Coast 25 Fort Bragg, California Coastal Mendocino County 1971 Mendocino Coast District Hospital 2020 Adventist Health Portland 302 Portland, Oregon Portland-Vancouver metropolitan area 1893
1973 Adventist Health Reedley 49 Reedley, California Southern Fresno County and northern Tulare County 1962 Sierra Kings District Hospital 2011 Adventist Health Selma 57 Selma, California Southern Fresno County 1908
1999 Adventist Health Sierra Vista 162 San Luis Obispo, California San Luis Obispo County 1959 Sierra Vista Regional Medical Center 2024 Adventist Health Simi Valley 136 Simi Valley, California Ventura County 1965
― Adventist Health Sonora 152 Sonora, California Tuolumne and Mariposa counties 1956
2017 Adventist Health Specialty Bakersfield 47 Bakersfield, California Kern County 1995 Bakersfield Heart Hospital 2023 Adventist Health St. Helena 151 St. Helena, California Napa County 1878 St. Helena Hospital 2017 Adventist Health Tehachapi Valley 25 Tehachapi, California Tehachapi Valley 2018 ― Adventist Health Tillamook 25 Tillamook, Oregon North Oregon Coast 1950 1973 Adventist Health Tulare 101 Tulare, California Tulare County 1971 Tulare Regional Medical Center 2018 Adventist Health Twin Cities 122 Templeton, California San Luis Obispo County 1977 Twin Cities Community Hospital 2024 Adventist Health Ukiah Valley 50 Ukiah, California Ukiah Valley 1956
1978 Adventist Health Vallejo 61 Vallejo, California Napa and Solano counties 1963
2017 Adventist Health White Memorial 353 Los Angeles, California Eastside and Boyle Heights neighborhoods 1913
1963 Adventist Health White Memorial Montebello 202 Montebello, California Gateway Cities 1942 Beverly Community Hospital 2023
Closed hospitals Fremont Memorial Hospital was a hospital in Yuba City, California, part of the Fremont-Rideout Health Group which later merged into Adventist Medical Group. The hospital was closed in 2017. Adventist Health Feather River was a 101-bed hospital in Paradise, California established in 1950 as Feather River Hospital. It was acquired by Adventist Health in 1973 and closed in 2018 after the facility was destroyed by the Camp Fire.
Divestiture In Jan 2020, Adventist would manage Dameron Hospital in Stockton, CA. In 2024, it exited the arrangement due to poor financial performance.
Mergers and acquisitions On February 29, 2024, Adventist Health signed a definitive agreement to purchase Sierra Vista Regional Medical Center in San Luis Obispo, California and Twin Cities Community Hospital in Templeton, California for $550 million from Tenet Healthcare. On March 29, Adventist Health took over the management of the hospitals.
See also Adventist Health International AdventHealth Adventist HealthCare Adventist Health Studies Kettering Health Loma Linda University Medical Center Adventist Health Arena
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