The NBA made the announcement on Tuesday. The incident occurred with 4:28 remaining in the second quarter of the Clippers' 120-100 win over the Phoenix Suns on Sunday at US Airways Center.
Barnes finished with four points, going 1-for-9 from the field.
Barnes reacted to the fine on Twitter, unleashing a series of tweets in which he implicated Suns owner Robert Sarver as the instigator of the incident:
The Associated Press contributed to this report.
Clippers' Barnes Blames Suns Owner For Rant
ESPNLosAngeles.com's Arash Markazi breaks down Clippers forward Matt Barnes' claim that his use of inappropriate language was directed at Suns owner Robert Sarver.