The Rangers provided no further information. Kreider, 22, was hurt in last Friday's 3-1 victory over Columbus.
Kreider was a breakout star in the playoffs two years ago, and he has 17 goals and 37 points in 66 games in what has been a bounce-back season for him.
Although he sustained the injury last Friday, Kreider played in the team's next two games with "minimal pain," according to coach Alain Vigneault.
Kreider was replaced in the lineup Wednesday against Philadelphia by call-up forward J.T. Miller.
"He brings a lot of speed to the game," center Derek Stepan said earlier this week of Kreider. "We have guys that certainly have to step up and bring that aspect to the game. We'll just have to make some adjustments."