| Flatau-Schilder disease 341.1 | 
  | Flattening | 
  |  | 
  |  | 
  |  | 
  |  | 
  | Flax dressers' disease 504 | 
  | Flea bite - see Injury, superficial, by site | 
  | Fleischer (-Kayser) ring (corneal pigmentation) 275.1  [371.14] | 
  | Fleischner's disease 732.3 | 
  |  | 
  | Flexibilitas cerea (see also Catalepsy) 300.11 | 
  | Flexion | 
  |  | 
  | Flexner's | 
  |  | 
  | Flexner-Boyd dysentery 004.2 | 
  | Flexure - see condition | 
  |  | 
  | Floating | 
  |  | 
  |  | 
  | Floor - see condition | 
  | Floppy | 
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  | Flu - see also Influenza | 
  |  | 
  | Fluctuating blood pressure 796.4 | 
  | Fluid | 
  |  | 
  | Flukes NEC (see also Infestation, fluke) 121.9 | 
  |  | 
  | Fluor (albus) (vaginalis) 623.5 | 
  |  | 
  | Fluorosis (dental) (chronic) 520.3 | 
  |  | 
  |  | 
  |  | 
  | Flutter | 
  |  | 
  | Flux (bloody) (serosanguineous) 009.0 | 
  | Focal - see condition | 
  | Fochier's abscess - see Abscess, by site | 
  | Focus, Assmann's (see also Tuberculosis) 011.0 | 
  |  | 
  | Foix-Alajouanine syndrome 336.1 | 
  | Folds, anomalous - see also Anomaly, specified type NEC | 
  |  | 
  |  | 
  | Follicle | 
  |  | 
  | Folliclis (primary) (see also Tuberculosis) 017.0 | 
  | Follicular - see also condition | 
  |  | 
  |  | 
  |  | 
  | Folliculosis, conjunctival 372.02 | 
  | Føllling's disease (phenylketonuria) 270.1 | 
  | Follow-up (examination) (routine) (following) V67.9 | 
  |  | 
  | Fong's syndrome (hereditary osteoonychodysplasia) 756.89 | 
  | Food | 
  |  | 
  | Foot - see also condition | 
  |  | 
  | Foramen ovale (nonclosure) (patent) (persistent) 745.5 | 
  | Forbes' (glycogen storage) disease 271.0 | 
  | Forbes-Albright syndrome (nonpuerperal amenorrhea and lactation associated with pituitary tumor) 253.1 | 
  | Forced birth or delivery NEC 669.8 | 
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