- Ibuprofen
- Ileostomy
- Immunisation, childhood
- Immunisation, pneumococcal
- Immunisation, travel
- Immunisations, adult
- Impetigo
- Impotence
- Incontinence, bowel
- Incontinence, urinary
- Indigestion
- Indigestion (dyspepsia) in pregnancy
- Indoor allergy (perennial allergic rhinitis)
- Infertility
- Influenza (flu)
- Influenza vaccination
- Ingrown toenail
- Inguinal hernia
- Inquest
- Insect bites
- Insomnia
- Insulin-dependent diabetes
- Intensive care
- Intrauterine device (IUD)
- Intrauterine insemination
- Intrauterine system (IUS)
- Iritis
- Iron overload disorder
- Irritable bowel syndrome
- Irritable hip
- Itching
- Itchy bottom
- IVF