Physician Quotes
- Johannes Stark 1874 - 1957
- John Ambrose Fleming 1849 - 1945
- John Arbuthnot 1667 - 1735
- John Archibald Wheeler 1911 - 2008
- John Bardeen 1908 - 1991
- John D. Barrow 1952 - 2020
- John Dalton 1766 - 1844
- John Henry Carver 1926 - 2004
- John Joly 1857 - 1933
- John Kitzhaber 1947 -
- John Lilly 1915 - 2001
- John Locke 1632 - 1704
- John M. Grunsfeld 1958 -
- John McCrae 1872 - 1918
- John Polkinghorne 1930 - 2021
- John Tyndall 1820 - 1893
- John von Neumann 1903 - 1957
- Jonathan Miller 1934 - 2019
- Joseph Rotblat 1908 - 2005
- Karl Abraham 1877 - 1925
- Karl Brandt 1904 - 1948
- Karl Jaspers 1883 - 1969
- Karl Landsteiner 1868 - 1943
- Keiji Fukuda 1954 -
- Ken Jeong 1969 -
- Kent Brantly 1987 -
- Kevin R. Stone 1955 -
- Khaled Hosseini 1965 -
- Konrad von Gesner 1516 - 1665
- Larry Brilliant 1944 -
- Larry Bucshon 1962 -
- Laurel Clark 1961 - 2003
- Leon Kass 1939 -
- Lewis Thomas 1913 - 1993
- Louis-Ferdinand Celine 1894 - 1961
- Luis Federico Leloir 1906 - 1987
- Luis Walter Alvarez 1911 - 1988
- Mae Jemison 1956 -
- Maimonides 1135 - 1204
- Marcia Angell 1939 -