Hickey was released from his professional tryout agreement on Monday by New Jersey.
Hickey signed a professional tryout agreement with New Jersey on Tuesday.
Hickey was elevated from AHL Bridgeport on Tuesday, Andrew Gross of Newsday reports.
Hickey was assigned to AHL Bridgeport on Wednesday.
Hickey has cleared waivers but remains with the team, Andrew Gross of Newsday reports.
Hickey was designated for waivers by the Islanders on Saturday, Sportsnet's Chris Johnston reports.
Hickey has one more year left on his contract with the Islanders.
Hickey was promoted to the active roster Tuesday, per CapFriendly.
Hickey has been a healthy scratch for the past 18 games for the Islanders.