- Gottlieb Memorial Hospital
- Graham Hospital Association
- Hamilton Memorial Hospital District
- Hammond Henry Hospital
- Hardin County General Hospital
- Hartgrove Hospital
- Highland Park Hospital
- Hillsboro Area Hospital
- Holy Cross Hospital
- Holy Family Medical Center
- Hopedale Medical Complex
- Horizon Health
- HSHS Good Shepherd Hospital
- HSHS Holy Family Hospital
- HSHS St Anthonys Memorial Hospital
- HSHS St Elizabeths Hospital
- HSHS St Francis Hospital
- HSHS St Johns Hospital
- HSHS St Josephs Hospital - Breese
- HSHS St Josephs Hospital - Highland
- HSHS St Marys Hospital
- Humboldt Park Health
- Illini Community Hospital
- Insight Hospital & Medical Center Chicago
- Iroquois Memorial Hospital
- Jackson Park Hospital & Medical Center
- Jacksonville Memorial Hospital
- Javon Bea Hospital - Riverside
- Jersey Community Hospital
- John H Stroger Jr Hospital of Cook County