- Abbeville Area Medical Center
- Abbeville General Hospital
- Abbott Northwestern Hospital
- Abrazo Arizona Heart Hospital
- Abrazo Arrowhead Campus
- Abrazo Central Campus
- Abrazo Scottsdale Campus
- Abrazo West Campus
- Acadian Medical Center
- Acadia Sonora Behavioral Hospital
- Acadia-St. Landry Hospital
- Acadia Vermilion Hospital
- Accel Rehabilitation Hospital Plano
- Access Hospital Dayton
- ACMH Hospital
- Acoma Canoncito Laguna Hospital
- Acuity Specialty Hospital
- Acute Care Specialty Hospital
- Adair County Memorial Hospital
- Adams County Regional Medical Center
- Adams Memorial Hospital
- Adcare Hospital Of Worcester
- Adena Regional Medical Center
- Ad Hospital East Llc
- Adirondack Medical Center
- Advanced Care Hospital of Montana
- Advanced Care Hospital of Southern New Mexico
- Advanced Care Hospital Of White Co.
- Advanced Diagnostics - East Houston Hospital
- Advanced Health Imaging