The forward, who was acquired in a trade with the New Jersey Devils on Feb. 25, left the game after being injured on a hit by Carolina Hurricanes forward Micheal Ferland in the first period of Boston's 4-3 overtime win at TD Garden on Tuesday.
The Bruins issued the following statement on Johansson's condition:
"Marcus Johansson was brought to the Massachusetts General Hospital during the game against Carolina on March 5 for evaluation. Testing revealed a lung contusion. He was monitored overnight and was discharged today after further evaluation by specialists.
"He will be re-evaluated in approximately one week."
Johansson has one assist in four games with the Bruins. The 28-year-old had 27 points (12 goals, 15 assists) in 48 games for the Devils this season.
Boston (40-17-9) has a 17-game point streak and will seek its fifth straight win when it hosts the Florida Panthers on Thursday (7 p.m. ET; SN1, SNE, SNO, NESN, FS-F, NHL.TV). The Bruins lead the Toronto Maple Leafs by three points for second place in the Atlantic Division.