The artist, whose real name is Anthony Smith, entered the plea in a Burbank, Calif., courthouse on Thursday. Known for the hits "Wild Thing" and "Funky Cold Medina," Smith was arrested in the city which is north of Los Angeles on June 18.
He also faces a felony possession of an assault weapon charge because Burbank police discovered the rapper has an unregistered Colt AR-15 rifle.
He returns to court on July 28.
Police have released few details about the 45-year-old's arrest, saying only that he was taken into custody after a woman accused him of assault.
An after-hours phone message left for Smith's agent was not immediately returned.
The Associated Press contributed to this report.