- 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
- Tourette's disease (motor-verbal tic) 307.23
- Tower skull 756.0
- Toxemia 799.89
- Toxemica cerebropathia psychica (nonalcoholic) 294.0
- Toxic (poisoning) - see also condition
- Toxicemia - see Toxemia
- Toxicity
- Toxicosis (see also Toxemia) 799.89
- Toxinfection 799.89
- Toxocariasis 128.0
- Toxoplasma infection, generalized 130.9
- Toxoplasmosis (acquired) 130.9
- Trabeculation, bladder 596.89
- Trachea - see condition