Darcy Kuemper made 39 saves, Richard Panik and Vinnie Hinostroza scored, and the Coyotes beat the St. Louis Blues 3-1 on Tuesday.
Kuemper was back on his game one night after he allowed four goals on 16 shots before he was pulled during the second period of the Coyotes' 7-1 loss to the Blackhawks. He has won 10 of his last 12 starts to improve to 23-16-5 this season.
The Coyotes have won 12 of 16 to move one point ahead of Minnesota for the final Western Conference wild card.
Jaden Schwartz scored for St. Louis, and Jordan Binnington stopped 19 shots.
Schwartz scored a power-play goal with 1:11 left to give St. Louis a chance. Schwartz's seventh goal of the season snapped a streak of eight consecutive games without registering a point, and marked the 300th point of his career.
Arizona put it away when Ekman-Larsson added an empty-net goal with 22 seconds remaining.
The Blues are at Ottawa to start a three-game road trip Thursday.