| T3 | Triiodothyronine | - | Medical(slang) |
| T3 | Triiodothyronine | - | Medical(slang) |
| T4 | Thyroxine | - | Medical(slang) |
| TB | Tuberculosis/Trouble Breathing | - | Medical(slang) |
| TBF | Total Body Failure | - | Medical(slang) |
| TBI | Traumatic Brain Injury | - | Medical(slang) |
| TBSA | Total Body Surface Area | - | Medical(slang) |
| TCDB | Turn, Cough, Deep Breathe | - | Medical(slang) |
| TED | Thrombo-Embolism Deterrent | - | Medical(slang) |
| TED | (hose) Thrombo-embolism Deterrent | - | Medical(slang) |
| TEP | Transesophageal Puncture | - | Medical(slang) |
| THR | Total Hip Replacement | - | Medical(slang) |
| THR | Total Hip Replacement | - | Medical(slang) |
| TIA | Transient Ischemic Attack | - | Medical(slang) |
| TIBC | Total Iron Binding Capacity | - | Medical(slang) |
| TID | Three Times A Day | - | Medical(slang) |
| TIL | Tumor Infiltrating Lymphocytes | - | Medical(slang) |
| TKR | Total Knee Replacement | - | Medical(slang) |
| TM | Tympanic Membrane | - | Medical(slang) |
| TNF | Tumor Necrosis Factor | - | Medical(slang) |
| TNM | Tumor, Node, Metastases | - | Medical(slang) |
| TNTC | Too Numerous To Mention | - | Medical(slang) |
| TP | Tuberculin Precipitation | - | Medical(slang) |
| TP | Tuberculin Precipitation | - | Medical(slang) |
| TPN | Total Parenteral Nutrition | - | Medical(slang) |
| TPR | Temperature | - | Medical(slang) |
| TTN | Transient Tachypnea Of The Newborn | - | Medical(slang) |
| TTP | Thrombotic Thrombocytopenia Purpura | - | Medical(slang) |
| TUPR | Trans-urethral Prostatic Resection | - | Medical(slang) |
| TUR | Trans-Urethral Resection Of The Prostate | - | Medical(slang) |
| TUR | (or TURP) Trans-urethral Resection Of The Prostate | - | Medical(slang) |
| TURP | Trans-Urethral Resection Of The Prostate | - | Medical(slang) |
| TWB | Touch Weight Bear | - | Medical(slang) |
| TWE | Tap Water Enema | - | Medical(slang) |
| TX | Treatment | - | Medical(slang) |
