A long-term deal between PeaceHealth and United General was announced after approval by commissioners of Public Hospital District 304 in Skagit County.
The facility, which will still be owned by the Public Hospital District, would be renamed the PeaceHealth United General Medical Center.
United General will remain a critical-access hospital, according to PeaceHealth.
The facility, which opened in 1965, serves a number of communities in Whatcom and Skagit counties, including Burlington, Sedro-Woolley, Bayview, Samish Island, Concrete, Marblemount, Clear Lake and areas of Mount Vernon.
Since 2010, PeaceHealth has run a clinic on the United General campus specializing in pulmonology, gastroenterology and sleep medicine.
Some Bellingham doctors have transitioned to the Sedro-Woolley hospital in the past two years, including cardiologists and surgeons.