- Fröhlich's disease or syndrome (adiposogenital dystrophy) 253.8
- Froin's syndrome 336.8
- Frommel's disease 676.6
- Frommel-Chiari syndrome 676.6
- Frontal - see also condition
- Frostbite 991.3
- Frotteurism 302.89
- Frozen 991.9
- Fructosemia 271.2
- Fructosuria (benign) (essential) 271.2
- Fuchs'
- Fucosidosis 271.8
- Fugue 780.99
- Fukuhara syndrome 277.87
- Fuller Albright's syndrome (osteitis fibrosa disseminata) 756.59
- Fuller's earth disease 502
- Fulminant, fulminating - see condition
- Functional - see condition
- Functioning
- Fundus - see also condition
- Fungemia 117.9
- Fungus, fungous
