| Friedrich-Erb-Arnold syndrome (acropachyderma) 757.39 | 
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  | Fröhlich's disease or syndrome (adiposogenital dystrophy) 253.8 | 
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  | Frommel-Chiari syndrome 676.6 | 
  | Frontal - see also condition | 
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  | Fructosuria (benign) (essential) 271.2 | 
  | Fuchs' | 
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  | Fuller Albright's syndrome (osteitis fibrosa disseminata) 756.59 | 
  | Fuller's earth disease 502 | 
  | Fulminant, fulminating - see condition | 
  | Functional - see condition | 
  | Functioning | 
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  | Fundus - see also condition | 
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  | Fungus, fungous | 
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  | Funiculitis (acute) 608.4 | 
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  | Funnel | 
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  | Furor, paroxysmal (idiopathic) (see also Epilepsy) 345.8 | 
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  | Furrowing nail(s) (transverse) 703.8 | 
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  | Furunculosis (see also Furuncle) 680.9 | 
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  | Fusion, fused (congenital) | 
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  | Fusospirillosis (mouth) (tongue) (tonsil) 101 | 
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  | Gain, weight (abnormal) (excessive) (see also Weight, gain) 783.1 | 
  | Gaisböck's disease or syndrome (polycythemia hypertonica) 289.0 | 
  | Gait | 
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  | Galactocele (breast) (infected) 611.5 | 
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  | Galactosemia (classic) (congenital) 271.1 | 
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  | Galen's vein - see condition | 
  | Gallbladder - see also condition | 
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