Near the end of his career, Blum had a regularly recurring role on the Amazon Prime series Mozart in the Jungle from 2014 to 2018. He also made guest appearances on dozens of shows throughout his career.
Blum was born in Newark, New Jersey, to Lorraine (née Fink) and Morton Blum, who worked in the insurance industry. His family was Jewish. He grew up in Maplewood, New Jersey, and graduated from Columbia High School in 1968 and was inducted into the school's hall of fame in 2012. He then went on to graduate from the University of Pennsylvania.
Blum started acting on stage in the 1970s. In the 1980s, he acted in the movies Lovesick (1983), Desperately Seeking Susan (1985), Just Between Friends (1986), Crocodile Dundee (1986), Blind Date (1987), and The Presidio (1988). He later appeared in Coin Heist (2017).

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