Kevin Durant was ejected from Saturday's Game Four win against the Dallas Mavericks for a blow to the head of Justin Anderson.
The rule for a Flagrant 2 is "unnecessary and excessive contact" and the league office will review the foul with the latitude to suspend Durant for Game 5 of the series, which the Thunder lead 3-1.
The NBA sent out a memo to teams before the playoffs emphasizing the crackdown on blows to the head whether or not they were intentional.
On Sunday, Durant was fined $15,000 but not suspended.