- Sarah Bush Lincoln Health Center
- Sarah D Culbertson Memorial Hospital
- Schwab Rehabilitation Hospital
- Shirley Ryan AbilityLab
- Shriners Childrens - Chicago
- SIH Harrisburg Medical Center
- SIH Herrin Hospital
- SIH Memorial Hospital of Carbondale
- SIH St Joseph Memorial Hospital
- Silver Cross Hospital
- Silver Oaks Behavioral Hospital
- Sinai Childrens Hospital
- Skokie Hospital
- South Shore Hospital
- Sparta Community Hospital
- Springfield Memorial Hospital
- SSM Health Good Samaritan Hospital - Mt Vernon
- SSM Health St Marys Hospital - Centralia
- St Bernard Hospital
- St Johns Childrens Hospital
- Streamwood Behavioral Healthcare System Hospital
- Superior Diagnostic Imaging Center
- Swedish Hospital
- Taylorville Memorial Hospital
- The Loretto Hospital
- The Pavilion Hospital
- The Quad Cities Rehabilitation Institute
- The Rehabilitation Institute of Southern Illinois
- Thomas H Boyd Memorial Hospital
- Thorek Memorial Hospital