- Alta Bates Summit Medical Center - Herrick Campus
- Alta Bates Summit Medical Center - Summit Campus
- Alta View Hospital
- Alta Vista Regional Hospital
- Alton Memorial Hospital
- Alton Mental Health Center
- Altru Hospital
- Altru Rehabilitation Hospital
- Altus Lumberton Hospital
- Alvarado Parkway Institute Behavioral Health System - La Mesa
- Amarillo Specialty Hospital
- AM Behavioral Huber Heights
- Amberwell Atchison
- Amberwell Hiawatha
- American Family Childrens Hospital
- American Fork Hospital
- American Recovery Center
- American River Psychiatric Health Facility
- Amery Hospital & Clinic
- AMG Physical Rehabilitation Hospital - Covington
- AMG Specialty Hospital - Albuquerque
- AMG Specialty Hospital - Central Indiana Hancock Campus
- AMG Specialty Hospital - Central Indiana Muncie Campus
- AMG Specialty Hospital - Houma
- AMG Specialty Hospital - Lafayette
- AMG Specialty Hospital - Las Vegas
- AMG Specialty Hospital North Mississippi
- AMG Specialty Hospital Northwest Indiana
- AMG Specialty Hospital - Oklahoma City
- AMG Specialty Hospital - Zachary