• Floating
  • Flooding 626.2
  • Floor - see condition
  • Floppy
  • 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
  • Flush syndrome 259.2
  • Flushing 782.62
  • Flutter
  • Flux (bloody) (serosanguineous) 009.0
  • Focal - see condition
  • Fochier's abscess - see Abscess, by site
  • Focus, Assmann's (see also Tuberculosis) 011.0
  • Fogo selvagem 694.4
  • Foix-Alajouanine syndrome 336.1
  • Folds, anomalous - see also Anomaly, specified type NEC
  • Folie a deux 297.3
  • Follicle