- Faber's anemia or syndrome (achlorhydric anemia) 280.9
- Fabry's disease (angiokeratoma corporis diffusum) 272.7
- Face, facial - see condition
- Facet of cornea 371.44
- Faciocephalalgia, autonomic (see also Neuropathy, peripheral, autonomic) 337.9
- Facioscapulohumeral myopathy 359.1
- Factitious disorder, illness - see Illness, factitious
- Factor
- Fahr-Volhard disease (malignant nephrosclerosis) 403.00
- Failure, failed
- Fainting (fit) (spell) 780.2
- Falciform hymen 752.49
- Fall, maternal, affecting fetus or newborn 760.5
- Fallen arches 734
- Falling, any organ or part - see Prolapse
- Fallopian
- Fallot's
- Fallout, radioactive (adverse effect) NEC 990
- False - see also condition
- Family, familial - see also condition
- Famine 994.2
- Fanconi (-de Toni) (-Debré) syndrome (cystinosis) 270.0