Marian Health System, which includes regional hospitals and clinics throughout the Midwest, has joined Ascension Health Alliance.
Officials at Edmundson-based Ascension Health — the nation's largest Catholic nonprofit health system — said the merger was effective today.
Tulsa, Okla.-based Marian operates about 30 hospitals and 150 clinics in Wisconsin, Minnesota, Oklahoma and Kansas. Ascension and Marian officials began talks more than two years ago.
In August 2012, the health systems announced plans to enter into an agreement. Specific terms of the transaction are confidential.