The deal will pay Sorokin $2 million, with half coming by way of a signing bonus and the other half as salary, according to Sportsnet's Elliotte Friedman
Sorokin, 24, inked a one-year pact for 2019-20 with the Islanders on Monday that allows him to join the club at training camp. However, he will not be permitted to play in Phase 4, which marks the beginning of the qualifying round.
The Russian puck-stopper has spent the previous five seasons with CSKA Moscow of the KHL. He posted a 1.50 goals-against average and a .935 save percentage over 40 appearances this season.
Sorokin was selected by New York in the third round of the 2014 NHL Draft.