Genesis Health System was created in 1869.
Mission Health System was created in 1998.
Benefis Health System was created in 1996.
CentraCare Health System was created in 1995.
Niagara Health System was created in 2005.
Erlanger Health System was created in 1889.
Sparrow Health System was created in 1912.
Riverside Health System was created in 1916.
Adventist Health System was created in 1973.
Alegent Health System was created in 1996.
Saint Luke's Health System was created in 1882.
Steward Health Care System was created in 2011.
Crozer-Keystone Health System was created in 1922.