- Jacomb Hood, G. P. (George Percy), 1857-1929, artist1
- Jarvis U.S.A. General Hospital (Baltimore, Md.)1
- John Crerar Library, compiler.1
- Johnson, Julian, Major1
- Keen, William W. (William Williams), 1837-19321
- King, W. S.1
- Kittel, Walther, 1887- author1
- Knies, P. T. (Phillip T.), author1
- Lalaisse, François-Hippolyte, 1812-1884, artist1
- Library of the Surgeon-General's Office (U.S.)1
- Low, James, 1781-18221
- Maatz, R. (Richard), author1
- Macleod, George H. B. (George Husband Baird), 1828-18921
- Magath, Thomas Byrd, 1895- , author1
- Manion, R. J. (Robert James), 1881-1943, author1
- Mann, James, 1759-18321
- Martin, Arthur Anderson, 1876-1916, author1
- Massachusetts. Surgeon-General's Office, author.1
- Matheson, Martin, author1
- Maurer, Christoph, 1558-1614, artist1