"I feel good today and I'm excited to be back," the 21-year-old forward, who has missed Vancouver's past 11 games and 13 of the first 26, said after the optional morning skate Tuesday.
He rejoined his teammates at practice Monday and declared himself good to go against the Kings after seeing how his body responded overnight.
"Getting in your first practice, you don't know how you're going to feel the next day," he said. "It felt really good waking up and really good out there this morning. I feel I'm ready to go."
Boeser is sixth on the Canucks in scoring with 11 points (four goals, seven assists). He missed a two-game road trip Oct. 24-25 with the groin injury but returned to play four games before aggravating it Nov. 2 against the Colorado Avalanche.
"This is a lot different than the last time. This is the best I've felt in a while," he said. "I feel I'm going to be able to move a lot better than before."
Boeser, who missed Vancouver's final 16 games last season after fracturing a bone in his back, saw a specialist and said he's confident the groin problem is behind him for good.
"To figure out what was wrong, I think that was one of my main issues," he said. "I wanted to know what was wrong and make sure it's not something serious so I would have to miss a lot of time. We did that, and the medical staff took all the right steps so we would know what the injury was and fix all the problems that were causing it."
Getting Boeser back should help Vancouver (11-13-2), which is 2-7-2 in its past 11 games without him in the lineup. The Canucks scored 16 goals during an eight-game losing streak before defeating the Kings 4-2 in Los Angeles on Saturday.
"Brock is a warrior and we're pumped to have him back," forward Jake Virtanen said.
Boeser practiced Monday on the top line with rookie center Elias Pettersson, who leads the Canucks with 13 goals and is second with 21 points, and Nikolay Goldobin.
"We think hockey the same. He is a skilled guy, good shot," Pettersson said Monday. "We all know how good a goal-scorer he is, so it's always nice to play with a guy who is good at hockey and creates chances for both himself and me.
