LOS ANGELES -- Fred Silverman, executive producer of such hits as "Doogie Howser, M.D.," "Laverne & Shirley" and "Taxi," has died at 82.

Silverman died Thursday night at Cedars-Sinai Medical Center, his son, television producer Rob Silverman, confirmed. He had suffered an apparent heart attack, according to media reports.

Fred Silverman joined NBC in 1971 and oversaw "Cheers," ''Taxi," ''The Cosby Show" and other sitcoms. He departed NBC in 1993 to work at Sony Pictures Television, where he was executive producer of such hits as "Roseanne," ''3rd Rock From the Sun" and "Ellen."

He left Sony in 1998 to set up a television production company and had a string of hits there, including "MADtv," ''Match Game" and "Perfect Strangers."

Silverman also owned such restaurants as Jack Stack's and the Silverlode, in West Hollywood.

Before his run at NBC, Silverman worked as an executive producer of dozens of series including "Fantasy Island," ''St. Elsewhere," ''Good Times," ''Miami Vice" and "Kojak."

His memoir, "Talent Is Overrated: And Other Thoughts I've Had on Being in Show Business," was published in 1995.

Silverman is survived by his wife of 25 years, the former model Cynthia Richburg; his son and daughter-in-law from his first marriage, Jody and Bruce Silverman; and three grandchildren.