He was given the penalty at 15:54 in the third period when he punched Thrashers defenseman Freddy Meyer during a scrum when both players were being contained by the refs. The scrum was the result of a high hit by Meyer on Lucic that resulted in the scrum and several fights.
Lucic was fined a total of $3,500 for the incident.
Bruins coach Claude Julien questioned Meyer's hit on Lucic after Thursday's game.
"That was a dirty hit," Julien said. "I've looked at it again and it's a cheap hit. Hopefully, it's seen that way."
While Julien and the Bruins clearly didn't like the hit, Thrashers coach Craig Ramsay didn't think there was anything wrong with it.
"Freddy laid a good hit," Ramsay said. "That is what happens -- you throw a big hit and you have to have a fight. We are taking hitting out of the game. He gets a penalty for a good hit. They started all the fights and I thought we should have had a power play for the rest of the game, maybe a two-man advantage."
Bruins general manager Peter Chiarelli released the following statement on Sunday:
"The NHL has informed us that Milan will not be suspended as a result of the match penalty assessed to him during our game against the Thrashers last Thursday. He will be fined $2,500 for the punch thrown in the scrum and $1,000 for making an obscene gesture directed at the Thrashers bench. He will join the team on the flight to Florida and be available for Monday's game against the Panthers."
The NHL held a hearing with the Bruins and Lucic via teleconference Sunday before the team left for Florida.
The Bruins and Thrashers play again Thursday in Atlanta.
Joe McDonald covers the Bruins for ESPNBoston.com.