- Hudson-Stähli lines 371.11
- Huguier's disease (uterine fibroma) 218.9
- Hum, venous - omit code
- Human bite (open wound) - (see also Wound, open, by site)
- Human immunodeficiency virus (disease) (illness) 042
- Human immunodeficiency virus-2 infection 079.53
- Human papillomavirus 079.4
- Human parvovirus 079.83
- Human T-cell lymphotrophic virus I infection 079.51
- Human T-cell lymphotrophic virus II infection 079.52
- Human T-cell lymphotropic virus-III (disease) (illness) (infection) - see Human immunodeficiency virus (disease) (illness) (infection)
- Humpback (acquired) 737.9
- Hunchback (acquired) 737.9
- Hunger 994.2
- Hungry bone syndrome 275.5
- Hunner's ulcer (see also Cystitis) 595.1
- Hunt's
- Hunter (-Hurler) syndrome (mucopolysaccharidosis II) 277.5
- Hunter's glossitis 529.4
- Hunterian chancre 091.0
- Huntington's
- Huppert's disease (multiple myeloma) (M9730/3) 203.0
