- Sacral Nerve Stimulation
- Salpingo-Oophorectomy
- Salpingostomy
- Scar Revision Surgery
- Scleral Buckling
- Sclerostomy
- Sclerotherapy for Esophageal Varices
- Sclerotherapy for Varicose Veins
- Scopolamine Patch
- Second Opinion
- Second-Look Surgery
- Sedation, Conscious
- Segmentectomy
- Sentinel Lymph Node Biopsy
- Septoplasty
- Sex Reassignment Surgery
- Shoulder Joint Replacement
- Shoulder Resection Arthroplasty
- Sigmoidoscopy
- Simple Mastectomy
- Skin Grafting
- Skull X Rays
- Sling Procedure
- Small Bowel Resection
- Smoking Cessation
- Snoring Surgery
- Sphygmomanometer
- Spinal Fusion
- Spinal Instrumentation
- Spirometry Tests
