After picking up his second technical foul during Utah's 107-104 victory, the Jazz reserve knocked the cellphone out of the hand of a spectator sitting courtside at Capital One Arena in Washington.
The fan appeared to be taking a photo or a video of the 6-foot-8 guard's exit from the court.
"I apologized to the man. It wasn't intentional," Hood told reporters Friday. "I regret it. You just learn from it and move on from it."
Hood becomes the fourth player to be fined this season for an interaction with a fan. DeMarcus Cousins, Kyrie Irving and Austin Rivers each were fined $25,000 for separate incidents by NBA executive vice president of basketball operations Kiki VanDeWeghe.
The 6-foot-8, 206-pound sharpshooter has averaged a career-high 16.5 points per game this season as the Jazz have struggled to a 17-25 record following Friday's loss at the Charlotte Hornets.
The Associated Press contributed to this report.