Scott L. Friedman (born June 13, 1955) is an American scientist, professor and physician who works in the field of hepatology. Friedman has conducted pioneering research into the underlying causes of scarring, or fibrosis, associated with chronic liver disease, by characterizing the key fibrogenic cell type, the hepatic stellate cell His laboratory has also discovered a novel tumor suppressor gene, KLF6 that is inactivated in a number of human cancers including primary liver cancer.