John Stanley Ragin was an American television and film actor. He was best known for his role as uptight, bureaucratic Dr. Robert Asten, M.E. in the TV series Quincy, M.E. (1976–83).

Quincy, M.E. is an American mystery medical drama television series from Universal Studios that was broadcast on NBC from October 3, 1976, to May 11, 1983. Jack Klugman starred in the title role as a Los Angeles County medical examiner who routinely engages in police investigations.