The ACM intervened in cases where trade associations of health care providers shared non-public information affecting negotiations with health insurers, leading to potential price inflation. The interventions aimed to uphold the principle of individual negotiations in health care contracting, ensuring that health care providers and insurers can set their own prices and conditions without interference. The affected parties adjusted their behavior after being confronted by the ACM, with health insurers ceasing to share price information and one trade association removing problematic information from its reports. Trade associations are allowed to provide factual information to members but are prohibited from sharing information that may influence negotiations between health care providers and buyers. The ACM's actions highlight the importance of fair competition and transparency in health care contracting processes.