- Jenner, Edward, 1749-1823.2
- Joints -- surgery1
- Joly, N. (Nicolas), 1812-1885.1
- Joséphine Charlotte, Grand Duchess, consort of Jean, Grand Duke of Luxemburg, 1927-2005.1
- Judgment1
- Julie, Sister, 1854-1925.5
- Kidney -- physiology1
- Kirmisson, Edouard François, 1848-1927.1
- Koch, Robert, 1843-1910.1
- Labienus, -45 B.C.1
- Laboratories13
- Laboratories -- economics1
- Lacrimal Apparatus -- surgery1
- Laryngoscopes1
- Laryngoscopy -- methods1
- Lavoisier, Antoine Laurent, 1743-1794.1
- Laxatives3
- Leeches -- cytology1
- Leg1
- Leg Injuries -- nursing1