| Region 4 Hospitals | Acadia  Parish | Evangeline Parish | Iberia Parish | Lafayette Parish | St. Landry Parish | St. Martin Parish | Vermillion Parish | 
| Abbeville General Hospital |  |  |  |  |  |  | ED | 
| Abrom Kaplan Memorial Hospital |  |  |  |  |  |  | ED | 
| Acadia General Hospital |  |  |  |  |  |  | ED | 
| Acadia St. Landry Hospital |  |  |  |  |  |  | ED | 
| Compass Behavioral Hospital |  |  |  | no ED |  |  |  | 
| Genesis Behavioral Hospital |  |  |  |  |  |  |  | 
| Heart Hospital of Lafayette |  |  |  | ED |  |  |  | 
| Iberia General Hospital & Medical Center |  |  | ED |  |  |  |  | 
| Iberia Rehabilitation Hospital |  |  | no ED |  |  |  |  | 
| Lafayette-AMG Specialty Hospital |  |  |  | no ED |  |  |  | 
| Lafayette General Medical Center |  |  |  | ED |  |  |  | 
| Lafayette General Surgical Hospital |  |  |  | no ED |  |  |  | 
| Lafayette Physical Rehabilitation Hospital |  |  |  | no ED |  |  |  | 
| Lafayette Surgical Specialty Hospital |  |  |  | no ED |  |  |  | 
| Louisiana Extended Care Hospital of Lafayette |  |  |  | no ED |  |  |  | 
| Mercy Regional Medical Center |  | ED |  |  |  |  |  | 
| Oceans Behavioral Hospital of Opelousas |  |  |  |  | no ED |  |  | 
| Oceans Hospital of Broussard |  |  |  | no ED |  |  |  | 
| Opelousas General Health System |  |  |  |  | ED |  |  | 
| Our Lady of Lourdes Regional Medical Center, Inc. |  |  |  | ED |  |  |  | 
| Post Acute Medical Specialty Hospital of Lafayette |  |  |  | no ED |  |  |  | 
| Park Place Surgical Hospital |  |  |  | no ED |  |  |  | 
| Savoy Medical Center |  | ED |  |  |  |  |  | 
| St. Landry Extended Care Hospital |  |  |  |  | no ED |  |  | 
| St. Martin Hospital |  |  |  |  |  | ED |  | 
| University Hospital & Clinics |  |  |  | ED |  |  |  | 
| Vermillion Behavioral Health Systems |  |  |  |  |  |  | no ED | 
| Women's and Children's Hospital |  |  |  | ED |  |  |  |