- Anaheim Community Hospital
- Anaheim Global Medical Center
- Anchor Hospital
- Ancora Psychiatric Hospital
- Andalusia Regional Hospital
- Anderson County Hospital
- Anderson Hospital
- Anderson Rehabilitation Institute
- Androscoggin Valley Hospital
- Anew Health - Shawnee
- Angel Medical Center
- Animas Surgical Hospital
- AnMed Health Cannon
- AnMed Health Medical Center
- AnMed Health Rehabilitation Hospital
- AnMed Health Womens and Childrens Hospital
- Anna Jaques Hospital
- Annie Jeffrey Memorial County Health Center
- Ann Klein Forensic Center
- Ann & Robert H Lurie Childrens Hospital of Chicago
- Anoka-Metro Regional Treatment Center
- Anson General Hospital
- Antelope Memorial Hospital
- Antelope Valley Medical Center
- Anthony Medical Center
- Antioch Medical Center
- Apollo Behavioral Health Hospital
- Appalachian Behavioral Healthcare Hospital
- Appalachian Regional Behavioral Healthcare
- Appleton Area Health Services