• Thrombopenia (see also Thrombocytopenia) 287.5
  • Thrombophlebitis 451.9
  • Thrombosis, thrombotic (marantic) (multiple) (progressive) (vein) (vessel) 453.9
  • Thrombus - see Thrombosis
  • Thrush 112.0
  • Thumb - see also condition
  • Thygeson's superficial punctate keratitis 370.21
  • Thymergasia (see also Psychosis, affective) 296.80
  • Thymitis 254.8
  • Thymoma (benign) (M8580/0) 212.6
  • Thymus, thymic (gland) - see condition
  • Thyrocele (see also Goiter) 240.9
  • Thyroglossal - see also condition
  • Thyroid (body) (gland) - see also condition
  • Thyroiditis 245.9
  • Thyrolingual duct, persistent 759.2
  • Thyromegaly 240.9
  • Thyrotoxic
  • Thyrotoxicosis 242.9
  • TIA (transient ischemic attack) 435.9
  • Tibia vara 732.4
  • Tic 307.20