Robert Peter Kadlec (born 1957)
Dr. Henry H. Kane, MD (born 1854)
Dr. William Bamberger Karesh (born 1955)
Dr. Katalin Karikó (born 1955)
Dr. Alfred Judah Katz (born 1937)
Deborah Phyllis (Grossman) Katz (born 1948)
Dr. Jacqueline Marion Katz (born 1958)
Dr. Rebecca Lynn Katz (born 1973)
Dr. Fremont Ellis Kelsey (born 1912)
Dr. Frances Kathleen Oldham Kelsey (born 1914)
John George Kemeny (born 1926)
Dr. David Aaron Kessler (born 1951)
Dr. Annelisa Marcelle Kilbourn (born 1967)
Harold Jens Kildall (born 1894)
Gary Arlen Kildall (born 1942)
Dr. Jong Joseph Kim (born 1969)
Dr. Randall Lawrence Kincaid (born 1951)
Dr. Hans-Dieter Klenk (born 1938)
Dr. Gary Pignac Kobinger (born 1969)
Georges Jean Franz Köhler (born 1946)
Dr. Lisa Marlene Koonin (born 1955)
Marion Petronella Gerarda Koopmans (born 1956)
Dr. Hilary Koprowski (born 1916)
Dr. Arthur Kornberg (born 1918)
Dr. Roger David Kornberg (born 1947)
Dr. Pierre Daniel Kory (born 1970)
Dr. Laura Dean Kramer (born 1946)
Dr. Richard Michael Krause (born 1925)
Dr. Philip "Phil" Renatus Krause (born 1959)
Dr. Jens Holger Kuhn (born 1972)
Thomas Eugene Kurtz (born 1928)