- Sound Inpatient Physicians
- Sound Physicians
- South Coast Today
- South Dakota Department of Health
- South Dakota Health Care Association
- South Florida Sun Sentinel
- South Lafourche Nursing and Rehab
- Southern Administrative Services
- Southern Maine Health Care
- Southern New York Association
- Southern SNF Management
- Southern Traditions
- Southridge Healthcare Center
- Southwest LTC
- Spartanburg Regional Healthcare System
- Special Needs Plan Alliance
- Specialized Respiratory Services
- Specialty Rx Inc.
- SpiriTrust Lutheran
- Spring Creek Rehabilitation and Nursing Center