Diagnosaurus
- Facial palsy
- Factitious disorder
- Falls & gait disorders
- Fascioliasis (sheep liver fluke)
- Fat necrosis of the breast
- Fatty liver disease
- Fatty liver of pregnancy
- Fecal incontinence
- Fecal occult blood test, positive
- Female hypogonadism
- Fibrillation, atrial
- Fibrillation, ventricular
- Fibroadenoma, breast
- Fibrocystic breast disease
- Fibroids, uterine
- Fibromuscular dysplasia
- Fibromyalgia
- Filariasis
- Fistula, perianal
- Fixed drug eruption
- Flatfoot
- Flexor (volar) tenosynovitis
- Flutter, atrial
- Focal segmental glomerulosclerosis
- Folic acid deficiency
- Folliculitis
- Foot drop
- Foreign-body aspiration
- Fulminant hepatic failure
- Furuncles