ICD-10-CM
- Faber's syndrome (achlorhydric anemia)
- Fabry (-Anderson) disease
- Facet syndrome
- Fahr disease (of brain)
- Fahr Volhard disease (of kidney)
- Fainting (fit)
- Faltering growth
- Fanconi ('s) anemia
- Fanconi hypoplastic anemia
- Fanconi panmyelopathy
- Farber's disease or syndrome
- Farcy
- Fasciculation
- Fascioliasis
- Fasciolopsis, fasciolopsiasis (intestinal)
- Fascioscapulohumeral myopathy
- Fast pulse
- Faucitis
- Favism (anemia)
- Fazio-Londe disease or syndrome
- Fear complex or reaction
- Feared complaint unfounded
- Fede's disease
- Feeble-minded
- Feeble rapid pulse due to shock following injury
- Feigned illness
- Feil-Klippel syndrome (brevicollis)
- Feinmesser's (hidrotic) ectodermal dysplasia
- Felinophobia
- Fernell's disease (aortic aneurysm)
- Fertile eunuch syndrome
- FFA (frontal fibrosing alopecia)
- Fibroadenosis, breast (chronic) (cystic) (diffuse) (periodic) (segmental)
- Fibroelastosis (cordis) (endocardial) (endomyocardial)
- Fibromyalgia
- Fibromyositis
- Fibromyxolipoma
- Fibroplasia, retrolental
- Fibrothorax
- Fimbrial cyst
- Fish hook stomach
- Fishmeal-worker's lung
- Flabby ridge
- Flap, liver
- Flashbacks (residual to hallucinogen use)
- Flatau-Schilder disease
- Flax-dresser's disease
- Fleischer (-Kayser) ring (cornea)
- Fleshy mole
- Flexner's dysentery
- Flexner-Boyd dysentery
- Flint murmur (aortic insufficiency)
- Flooding
- Fluctuating blood pressure
- Flush syndrome
- FNHTR (febrile nonhemolytic transfusion reaction)
- Fochier's abscess - code by site under Abscess
- Fogo selvagem
- Foix-Alajouanine syndrome
- Folie à deux
- Fong's syndrome (hereditary osteo-onychodysplasia)
- Foramen ovale (nonclosure) (patent) (persistent)
- Forbes' glycogen storage disease
- Fordyce's disease (mouth)
- Fordyce-Fox disease
- Foreclosure on loan
- Formication
- Fort Bragg fever
- Foster-Kennedy syndrome
- Foul breath
- Foundling
- Foville's (peduncular) disease or syndrome
- Fox (-Fordyce) disease (apocrine miliaria)
- FPIES (food protein-induced enterocolitis syndrome)
- Frambesioma
- Franceschetti-Klein (-Wildervanck) disease or syndrome
- Frank's essential thrombocytopenia
- Franklin disease
- Fraser's syndrome
- Freeman Sheldon syndrome
- Frei's disease
- Fremitus, friction, cardiac
- Friderichsen-Waterhouse syndrome or disease
- Frigidity
- Fröhlich's syndrome
- Frotteurism
- Fructokinase deficiency
- Fructose 1,6 diphosphatase deficiency
- Fructosemia (benign) (essential)
- Fructosuria (benign) (essential)
- Fucosidosis
- Functioning, intellectual, borderline
- FUO (fever of unknown origin)
- Furloughed
- Furrier's lung
- Fusospirillosis (mouth) (tongue) (tonsil)
- Fussy baby
- Følling's disease