- Summa Health Behavioral Health Institute
- Summa Health System - Akron Campus
- Summa Health System - Barberton Campus
- Summa Rehab Hospital
- Summerlin Hospital Medical Center
- Summers County ARH Hospital
- Summersville Regional Medical Center
- Summerville Medical Center
- Summit Behavioral Healthcare Hospital
- Summit Healthcare Regional Medical Center
- Summit Medical Center
- Summit Medical Center
- Summit Oaks Hospital
- Summit Pacific Medical Center
- SummitRidge Hospital
- SUN Behavioral Columbus
- SUN Behavioral Delaware
- SUN Behavioral Houston
- SUN Behavioral Kentucky
- Suncoast Behavioral Health Center
- Sunnyview Rehabilitation Hospital
- Sunrise Canyon Hospital
- Sunrise Childrens Hospital
- Sunrise Hospital & Medical Center
- Sunrise Vista Behavioral Health Hospital
- Superior Diagnostic Imaging Center
- Surgeons Choice Medical Center
- Surgery Specialty Hospitals of America
- Surgical Hospital at Southwoods
- Surgical Hospital of Oklahoma