The NHL said Lapierre had been banned in anticipation of a disciplinary hearing, the date of which had yet to be determined.
The suspension came after Lapierre checked Boyle's face into the glass during the first period of Tuesday's 6-2 loss to San Jose in St. Louis.
Boyle crumpled to the ice after the hit, which triggered a brawl and resulted in Lapierre's ejection from the game. The San Jose player was removed from the ice on a stretcher and kept overnight at a St. Louis hospital.
The Sharks didn't release a medical update Wednesday but Boyle told the San Jose Mercury News in a text message he was "OK" and hopeful his symptoms would be minor.