MCBS, LLC reports hacking incident affecting 1.26 million individuals
Business Associate MCBS, LLC filed a breach report with HHS OCR for a hacking/IT incident. The filing, submitted on June 26, 2026, indicates that the data of 1,261,464 individuals was involved. The breach occurred on a network server. As a Business Associate, MCBS must notify the covered entities it serves. Healthcare organizations that contract with MCBS should verify if they are among the impacted entities and prepare for potential patient inquiries. This filing reflects the date the report was submitted to regulators, not necessarily when the incident occurred or was discovered.