• Genetic
  • Genital - see condition
  • Genito-anorectal syndrome 099.1
  • Genitourinary system - see condition
  • Genu
  • Geographic tongue 529.1
  • Geophagia 307.52
  • Geotrichosis 117.9
  • Gephyrophobia 300.29
  • Gerbode defect 745.4
  • GERD (gastroesophageal reflux disease) 530.81
  • Gerhardt's
  • Gerlier's disease (epidemic vertigo) 078.81
  • German measles 056.9
  • Germinoblastoma (diffuse) (M9614/3) 202.8
  • Germinoma (M9064/3) - see Neoplasm, by site, malignant
  • Gerontoxon 371.41
  • Gerstmann's syndrome (finger agnosia) 784.69
  • Gerstmann-Sträussler-Scheinker syndrome (GSS) 046.71
  • Gestation (period) - see also Pregnancy
  • Gestational proteinuria 646.2
  • Ghon tubercle primary infection (see also Tuberculosis) 010.0