- Fifth disease (eruptive) 057.0
- Filaria, filarial - see Infestation, filarial
- Filariasis (see also Infestation, filarial) 125.9
- Filatoff's, Filatov's, Filatow's disease (infectious mononucleosis) 075
- File-cutters' disease 984.9
- Filling defect
- Filtering bleb, eye (postglaucoma) (status) V45.69
- Fimbrial cyst (congenital) 752.11
- Fimbriated hymen 752.49
- Financial problem affecting care V60.2
- Findings, (abnormal), without diagnosis (examination) (laboratory test) 796.4
- Finger - see condition
- Finnish type nephrosis (congenital) 759.89
- Fire, St. Anthony's (see also Erysipelas) 035
- Fish
- Fisher's syndrome 357.0
- Fissure, fissured
- Fistula (sinus) 686.9
- Fit 780.39
- Fitting (of)
- Fitz's syndrome (acute hemorrhagic pancreatitis) 577.0
- Fitz-Hugh and Curtis syndrome 098.86
