AdventHealth Avista

In 1896, John Harvey Kellogg founded Boulder Sanitarium. It had a powerhouse, laundry, bakery, cottages, chicken houses, barn, greenhouse and an icehouse.^[6][7] In 1962, its name was changed to Boulder Memorial Hospital.^[8] Between the 1920s and 1950s, it went through several renovations.^[6] In 1930, a dormitory was built for nurses.^[6] In 1989, Boulder Community Hospital purchased the hospital and renamed it the Mapleton Center.^[6]

In 1990, Boulder Memorial Hospital changed its name to Avista Adventist Hospital and reopened in Louisville, Colorado.^[8] In 1996, Avista Adventist Hospital became part of the joint venture Centura Health when it was founded by PorterCare Adventist Health System and Catholic Health Initiatives.^[9][10]

On October 1, 2001, PorterCare Adventist Health System merged with Adventist Health System Sunbelt Healthcare Corporation after approval from the Federal Trade Commission.^[11]

In late 2017, the Colorado Senate passed a law requiring all hospitals to have their chargemaster on its website by January 1, 2018.^[12][13][14] The Centers for Medicare & Medicaid Services also required all hospitals to do the same by January 1, 2021.^[15] In early August 2022, Avista Adventist Hospital still had refused to comply.^[16] To force hospitals to comply the Colorado House of Representatives and Colorado Senate both passed laws forbidding hospitals from collecting debt by reporting patients to collection agencies.^[17][18]

On December 30, 2021, employees at Avista Adventist Hospital protected oxygen tanks from the Marshall Fire by spraying with hoses.^[19][20] In under two hours thirty patients were evacuated by ambulance to Longmont United Hospital and St. Anthony North, twenty-one patients were discharged and all hospital 100 employees were evacuated.^[19][21][22] While closed maintenance crews cleaned and repaired the hospital after it received damage from smoke and soot. Air filters and ceiling tiles were replaced; medical equipment, floors, walls and doors were washed. Also the air and water was tested.^[22][23] On January 18, 2022, Avista Adventist Hospital reopened.^[24][25]

On February 14, 2023, Centura Health announced that it would split up.^[26][27] On August 1, Centura Health split up with Avista Adventist Hospital rebranding to AdventHealth Avista.^[28][29][30]

In late February 2025, hospital purchased 40 acres (16 ha) by U.S. Route 36 in the Redtail Ridge development in Louisville for $34 million. The reason why the hospital purchased the land is because it is on a landlocked parcel, that makes it hard to attract new patients.^[31][32] In early May 2026, AdventHealth Avista sent to the planning and zoning commission its plans for a new 371,600 square foot (34,520 m²) hospital and a 62,000 square foot (5,800 m²) medical office building.^[33] Four days later they unanimously approved the plans for the new campus. The five-story hospital will open with 123 beds, and will have shell space to add another thirty.^[34][35]

The hospital received a grade A from The Leapfrog Group from fall 2015 to spring 2016,^[36] and again from May 2019 to May 2026.^[37][38][39]

• List of Seventh-day Adventist hospitals
• List of trauma centers in the United States