Boston general manager Don Sweeney said Monday that Gustavsson is waiting to be cleared for full participation by the medical staff.
Gustavsson started in the Bruins’ 6-2 loss to Anaheim on Jan. 26 was taken to a hospital with an undisclosed illness. The team later said it was for observation.
The 31-year-old Gustavsson has appeared in 15 games for Boston this season. He has a 9-3-1 record, 2.38 goals-against average and.915 save percentage.
The Bruins also recalled forward David Pastrnak from Providence. He and Subban joined the team Monday.