- Skyline Hospital
- Sleepy Eye Medical Center
- Slidell Memorial Hospital
- Slidell Memorial Hospital East
- SLV Health Regional Medical Center
- SMA Healthcare Marion County
- Smilow Cancer Hospital at Yale New Haven
- Smith County Memorial Hospital
- Smokey Point Behavioral Hospital
- SMP Health - St Aloisius
- SMP Health - St Andrews
- SMP Health - St Kateri
- Smyth County Community Hospital
- Snoqualmie Valley Hospital
- Snowden at Fredericksburg
- Socorro General Hospital
- Soin Medical Center - Kettering Health
- Sojourn at Seneca
- Solara Specialty Hospitals Brownsville
- Solara Specialty Hospitals Harlingen
- Solara Specialty Hospitals McAllen
- Soldiers & Sailors Memorial Hospital
- Sonoma Specialty Hospital
- Sonoma Valley Hospital
- Sonora Behavioral Health Hospital
- South Arkansas Regional Hospital
- South Baldwin Regional Medical Center
- South Bay Medical Center
- South Beach Psychiatric Center
- South Carolina Department Of Corrections Hospital