In response to the unfavorable 9th Circuit Court of Appeals decision in Wit v. United Behavioral Healthcare, which permits insurance companies to apply medical necessity criteria that limit access to intermediate levels of care for mental health and substance use disorders, numerous groups have filed amicus briefs seeking review by the full court of appeals. A group of state Attorney’s General filed an amicus brief that Maryland’s Attorney General joined. Their participation will be a good foundation for seeking further support and action on Parity Act enforcement.