The Ducks announced the results of Thompson's surgery Friday.
Thompson will be sidelined well into next season after playing through a serious injury for the Pacific Division champion Ducks, who fell one game short of the Stanley Cup finals. Anaheim lost the Western Conference finals to Chicago last month.
Thompson had two goals and four assists in 12 playoff games, playing an important two-way role. He sat out Anaheim's first-round sweep of Winnipeg after apparently getting hurt in the regular-season finale at Arizona.
Anaheim acquired Thompson from Tampa Bay last summer for two draft picks. He scored 18 points in 80 regular-season games.