- Impetigo
- Impotence
- Induction of labour
- Infections of genitourinary tract in pregnancy
- Infectious and parasitic diseases - general
- Influenza
- Inguinal hernia
- Insect sting
- Insomnia
- Insulin dependent diabetes mellitus
- Intentional self-harm
- Intestinal adhesion (bands) with obstruction
- Iron deficiency Anaemia
- Irritable bowel syndrome
- Irritant contact dermatitis