Modoc Medical Center Investigates Potential Data Breach Impacting Patient Information Modoc Medical Center (MMC), a critical-access healthcare provider in Alturas, California, is under investigation following reports of a potential data breach. The incident, allegedly occurring in mid-February 2026, is attributed to the threat actor Worldleaks and may have exposed sensitive patient information, including Social Security numbers and phone numbers. ClassAction.org, a legal reporting group, is leading an inquiry into whether affected individuals including current and former MMC patients can pursue a class action lawsuit. The investigation seeks to determine the scope of the breach and potential damages, such as loss of privacy, out-of-pocket costs, and time spent addressing the incident. While MMC has not officially confirmed the breach, attorneys are gathering reports from individuals who believe their data was compromised. The case could compel organizations to strengthen data protection measures if successful. No official statement from MMC has been released as of March 19, 2026.