| S/S | Signs & Symptoms | - | Medical(slang) |
| S/S | Signs & Symptoms | - | Medical(slang) |
| SAB | Spontaneous Abortion | - | Medical(slang) |
| SABA | Supplied Air Breathing Apparatus | - | Medical(slang) |
| SAED | SemiAutomatic External Defibrillator | - | Medical(slang) |
| SAST | Serum Aspartate Aminotransferase | - | Medical(slang) |
| SB | Spina Bifida | - | Medical(slang) |
| SBO | Small Bowel Obstruction | - | Medical(slang) |
| SC | Subcutaneous | - | Medical(slang) |
| SGPT | Serum Glutamic-pyruvic Transaminase | - | Medical(slang) |
| SLE | Systemic Lupus Erythematosus | - | Medical(slang) |
| SLUD | Salivation | - | Medical(slang) |
| SMO | Standing Medical Orders | - | Medical(slang) |
| SNF | Skilled Nursing Facility | - | Medical(slang) |
| SOB | Short(ness) Of Breath | - | Medical(slang) |
| SR | Sedimentation Rate | - | Medical(slang) |
| SS | Social Services | - | Medical(slang) |
| ST | Sinus Tachycardia (cardiac) | - | Medical(slang) |
| STD | Sexually Transmitted Disease | - | Medical(slang) |
| STH | Somatotropic Hormone | - | Medical(slang) |
| STM | Short Term Memory | - | Medical(slang) |
| SUI | Stress Urinary Incontinence | - | Medical(slang) |
| SUI | Stress Urinary Incontinence | - | Medical(slang) |
| SVR | Systemic Vascular Resistance | - | Medical(slang) |
| SVT | Supra-Ventricular Tachycardia | - | Medical(slang) |
| SX | Symptoms | - | Medical(slang) |
| SX | Surgery | - | Medical(slang) |
| SZ | Seizure | - | Medical(slang) |
