St. John Health System is a not-for-profit Catholic healthcare system built upon a founding mission established by the Sisters of the Sorrowful Mother nearly 82 years ago. St John Health System operates hospitals in Tulsa, Owasso, Sapulpa and Bartlesville. Other subsidiaries of St. John Health System include OMNI Medical Group primary care physicians, St. John Physicians, Inc. multi-specialty group practice; St. John Urgent Care Centers, St. John Villas Senior Living Centers and medical complexes in South Tulsa and Claremore.