Los Angeles Lakers head coach Frank Vogel says LeBron James' absence is preventative with the number one goal being that he is "healthy for the long haul".

James is listed as doubtful for the Lakers' clash with the Portland Trail Blazers on Wednesday due to knee swelling, having missed their past three games.

The four-time MVP had returned to Los Angeles prior to Sunday's 129-121 loss to the Atlanta Hawks after undergoing an MRI on his left knee.

"We're still working on trying to get the swelling down," Vogel told reporters on Tuesday.

"He's listed as doubtful for tomorrow. He's not here today. He got treatment outside of our facility today."

The 37-year-old had been in excellent offensive form prior to the knee problem, having scored 25 points or more in 18 straight games.

Despite that, the Lakers are battling with a 24-27 record but Vogel said they would not rush James back.

“The number one goal is that he’s healthy for the long haul," Vogel said. "Everything is else less important than that. We have to win games when he’s out.”

Vogel also confirmed that the Lakers had left James out for the past three games for preventative reasons, with the swelling offering concern for a potential injury.