- Fanconi's anemia (congenital pancytopenia) 284.09
- Farber (-Uzman) syndrome or disease (disseminated lipogranulomatosis) 272.8
- Farcin 024
- Farcy 024
- Farmers'
- Farsightedness 367.0
- Fascia - see condition
- Fasciculation 781.0
- Fasciculitis optica 377.32
- Fasciitis 729.4
- Fasciola hepatica infestation 121.3
- Fascioliasis 121.3
- Fasciolopsiasis (small intestine) 121.4
- Fasciolopsis (small intestine) 121.4
- Fast pulse 785.0
- Fat
- Fatal familial insomnia (FFI) 046.72
- Fatal syncope 798.1
- Fatigue 780.79
- Fatness 278.02
- Fatty - see also condition
- Fauces - see condition