Samuel Orkin Freedman, OC CQ FRSC (born May 8, 1928) is a Canadian clinical immunologist, professor and academic administrator.
In 1965, he co-discovered with Phil Gold the carcinoembryonic antigen, the basis of a blood test used in the diagnosis and management of people with colorectal cancer.
Born in Montreal, Freedman received a Bachelor of Science in 1948 and a Doctor of Medicine in 1953 from McGill University.
Freedman received an honorary degree from McGill in 1992.
[2] Until January 1, 2008, Freedman was senior advisor to the Sir Mortimer B. Davis Jewish General Hospital in Montreal, where he was previously research director.