The L.A. City Attorney's Office said the "matter remains open" and charges could be filed at a later date.
The statement read:
"The City Attorney's Office has reviewed all of the reports in this matter and considered all of the evidence. This matter has been set for City Attorney Hearings in which both the victim and the suspect will have an opportunity to be heard on different days. The victim will be advised of services available to her. The suspect will be informed that although we decline to file charges at this time, this matter remains open and we may file charges at any time prior to the expiration of the statute of limitations."
A hearing should be scheduled within the next month or so and is not open to the public.
Avenatti was arrested in November in Los Angeles and booked on suspicion of domestic partner violence.
An actress identified as Mareli Miniutti was granted a temporary restraining order against Avenatti, an attorney best known for representing porn star Stormy Daniels in her battle against President Donald Trump.
Avenatti has denied committing any act of domestic violence and said he would be exonerated.