Melissa Cunningham reported the incident to police in November, claiming that London became physically violent during an argument over custody of the couple's child.
TMZ reports that London's lawyers have been in touch with the Riverside County District Attorney's office in California, after authorities attempted to contact the former Party of Five star for questioning.
Prosecutors have since revealed plans to charge London with one count of misdemeanor domestic violence, which carries a sentence of up to one year in jail if he is convicted.
London's spokesperson said: "The allegation is false and no such abuse occurred. It is unfortunate that the DA's office has elected to reward Melissa's malicious behaviour and disregard the facts regarding the incident."
Last year, London was allegedly kidnapped and forced to do drugs at gunpoint, though his family instead accused him of suffering from substance addiction.
London has previously described Cunningham as "a very sick person".