Koepke (upper body) participated in Wednesday's morning skate but will be unavailable for the Bruins' matchup in New Jersey, Mike Morreale of NHL.com reports.
Koepke (upper body) was placed on injured reserve Saturday, per the NHL media site.
Koepke (upper body) won't be available for Saturday's game against Ottawa, Joe Haggerty of Boston Sports Journal reports.
Koepke was not on the ice at practice Friday, Steve Conroy of the Boston Herald reports.
Koepke (undisclosed) suffered an injury in the third period of Tuesday's game versus the Lightning, Conor Ryan of The Boston Globe reports.
Koepke scored a goal and added four hits in Sunday's 5-4 overtime loss to the Islanders.
Koepke scored a goal on two shots and added two hits in Thursday's 4-3 overtime win over the Flames.
Koepke produced an assist, four hits and a plus-2 rating in Monday's 4-3 loss to the Panthers.
Koepke signed a one-year, two-way contract with Boston on Monday.
Koepke was reassigned to AHL Syracuse on Monday.