Capitals General Manager Brian MacLellan did not say how long Ovechkin, who leads Washington in both goals and points this season, will be away from the team.
According to some reports, the 13-times NHL All-Star is not expected to be back with the team this week.
Washington have two home games this week before an outdoor road matchup with the Carolina Hurricanes on Saturday as part of the NHL's Stadium Series.
The Capitals are sitting fourth in the Metropolitan division and occupy the first wild-card playoff spot in the Eastern Conference.