The Czech forward could make his regular-season debut Thursday against Los Angeles although, with seven centres on their roster, the Stars may decide to make him a healthy scratch.
Stefan, 26, was placed on the list Oct. 3 with a hip injury and missed the team's first two regular-season games. He didn't record a goal in four pre-season games with the team.
The Stars acquired Stefan, the No. 1 pick in the 1999 draft, in a trade with Atlanta last June.
In 64 games with the Thrashers last season, Stefan recorded 10 goals and 14 assists.