• Trigonocephaly 756.0
  • Trihexosidosis 272.7
  • Trilobate placenta - see Placenta, abnormal
  • Trilocular heart 745.8
  • Trimethylaminuria 270.8
  • Tripartita placenta - see Placenta, abnormal
  • Triple - see also Accessory
  • Triplegia 344.89
  • Triplet
  • Triplex placenta - see Placenta, abnormal
  • Triplication - see Accessory
  • Trismus 781.0
  • Trisomy (syndrome) NEC 758.5
  • Tritanomaly 368.53
  • Tritanopia 368.53
  • Troisier-Hanot-Chauffard syndrome (bronze diabetes) 275.0
  • Trombidiosis 133.8
  • Trophedema (hereditary) 757.0
  • Trophoblastic disease (see also Hydatidiform mole) 630
  • Tropholymphedema 757.0
  • Trophoneurosis NEC 356.9
  • Tropical - see also condition