• Tularensis conjunctivitis 021.3
  • Tumefaction - see also Swelling
  • Tumor (M8000/1) - see also Neoplasm, by site, unspecified nature
  • Tumorlet (M8040/1) - see Neoplasm, by site, uncertain behavior
  • Tungiasis 134.1
  • Tunica vasculosa lentis 743.39
  • Tunnel vision 368.45
  • Turban tumor (M8200/0) 216.4
  • Türck's trachoma (chronic catarrhal laryngitis) 476.0
  • Türk's syndrome (ocular retraction syndrome) 378.71
  • Turner's
  • Turner-Kieser syndrome (hereditary osteo-onychodysplasia) 756.89
  • Turner-Varny syndrome 758.6
  • Turricephaly 756.0
  • Tussis convulsiva (see also Whooping cough) 033.9
  • Twiddler's syndrome (due to)
  • Twin
  • Twinning, teeth 520.2
  • Twist, twisted
  • Twitch 781.0
  • Tylosis 700
  • Tympanism 787.3