- Tongue tie 750.0
- Toni-Fanconi syndrome (cystinosis) 270.0
- Tonic pupil 379.46
- Tonsil - see condition
- Tonsillitis (acute) (catarrhal) (croupous) (follicular) (gangrenous) (infective) (lacunar) (lingual) (malignant) (membranous) (phlegmonous) (pneumococcal) (pseudomembranous) (purulent) (septic) (staphylococcal) (subacute) (suppurative) (toxic) (ulcerative) (vesicular) (viral) 463
- Tonsillopharyngitis 465.8
- Tooth, teeth - see condition
- Toothache 525.9
- Topagnosis 782.0
- Tophi (gouty) 274.0
- Torn - see Tear, torn
- Tornwaldt's bursitis (disease) (pharyngeal bursitis) 478.29
- Torpid liver 573.9
- Torsion
- Torticollis (intermittent) (spastic) 723.5
- Tortuous
- Torula, torular (infection) 117.5
- Torulosis 117.5
- Torus
- Touch, vitreous 997.99
- Touraine's syndrome (hereditary osteo-onychodysplasia) 756.89
- Touraine-Solente-Golé syndrome (acropachyderma) 757.39
