In 1970 an Intensive Care Unit was introduced with a 4-bed unit for seriously ill or injured patients. And, in 1975 the first hospital-based home care service brought to the Alton community.
In this era, Operating Rooms opened and Surgery was added. An Emergency Room opened in 1983, with renovation completed in 1989. Saint Anthony’s Adult Day Services was established in 1986 and in 1988, The Women’s Pavilion obstetrics unit was opened. Saint Anthony’s Hospital acquired St. Joseph’s Hospital in 1989 and renamed the facility Saint Clare’s Hospital.
In 1990 the Diabetes Treatment Center opened, and the first cardiac catheterization was performed at Saint Anthony’s Health Center. Inpatient Physical Rehabilitation was added on the Saint Clare’s Hospital Campus in 1992, and in 1993 Saint Anthony’s Foundation was created to facilitate charitable giving. In 1994, The Women's Pavilion became certified as a Level II Perinatal Facility by the State of Illinois, and in 1997 the Sleep Studies Lab opened on the Saint Anthony’s Health Center campus.