LeBron James helped the defending champions edge ahead in the first half, before the hosts opened the third quarter with a 16-0 run to put themselves in control, allowing them to leapfrog the Pacers to regain top spot in the conference.
The San Antonio Spurs overturned a 21-point deficit to beat the Phoenix Suns, ensuring that they will finish the regular season with the best record in the NBA.
Eric Bledsoe led the Suns to a big lead during the second quarter, but Danny Green finished with a career-high 33 to give the Spurs home-court advantage throughout the playoffs.
Brandon Knight helped the Bucks surge ahead, before some late points from Chris Wright cancelled out the visitors' attempts at a comeback to leave Milwaukee two wins before the 76ers with three still to play.
Results in full: Washington Wizards 96-86 Orlando Magic, New York Knicks 108-100 Toronto Raptors, Charlotte 103-106 Boston Celtics, Atlanta Hawks 93-88 Brooklyn Nets, Indiana Pacers 86-98 Miami Heat, Detroit Pistons 98-106 Chicago Bulls, Philadelphia 76ers 95-117 Memphis Grizzlies, Houston Rockets 1110-112 Minnesota Timberwolves, New Orleans Pelicans 94-116 Oklahoma City Thunder, Cleveland Cavaliers 116-119 Milwaukee Bucks, Phoenix Suns 104-112 San Antonio Spurs, Portland Trail Blazers 111-99 Utah Jazz, Golden State Warriors 112-95 Los Angeles Lakers