Speaking to the media ahead of Monday night's series opener against the Tampa Bay Rays, Boone said LeMahieu will receive treatment on what he called a "tricky" injury, which has affected LeMahieu while swinging when he rotates on his back (right) foot.
"Hopefully it's something that medicine, treatment and the orthotics will help correct and relieve some of the symptoms he's been feeling," Boone told reporters.
"Right now, we'll kind of see how it goes day-to-day if he's getting a little more relief."
LeMahieu was a late scratch from the Yankees' lineup Sunday ahead of their 3-0 loss to the Boston Red Sox. After the game, he said he had a cortisone shot during the All-Star break to help alleviate the issue but that it has been "kind of creeping up a little bit" again.
Boone said Monday that an additional cortisone shot won't be part of LeMahieu's initial treatment this time.
The 34-year-old LeMahieu has been one of the most consistent hitters throughout the 2022 season, hitting .279/.381/.417 with 12 homers, 43 RBIs and 71 runs scored.
Also Monday, rehabbing Yankees slugger Giancarlo Stanton (Achilles soreness) went through a full workout ahead of the Rays game and plans to do the same the next two days, after which he could be sent out on a rehab stint.
Stanton hasn't played since July 23.
"The past few days have gone well," he told reporters. "I need another one or two to bounce back right. I'm still getting my feet under me, so that's why I need a few more days to make sure I'm good to go for a full game."
Information from ESPN's Joon Lee was used in this report.