Lue missed the Cavs' last nine games because of chest pains, lack of sleep and other health complications. Cleveland went 8-1 in that span, guided by associate head coach Larry Drew.
Lue has been around the team for the last "five or six days," according to Drew, ramping up toward a full return.
The Cavs, currently holding the No. 3 seed in the Eastern Conference, have four games remaining in the regular season.
Cleveland.com earlier reported Lue's plan to coach Thursday.