California health system sued over 2024 breach on health IT vendor TriZetto

California State Capitol Sacramento

The California State Capitol in Sacramento 

The cyberattack was not discovered until October 2025, and a headcount of the victims is still being conducted. In the meantime, a patient of Sacramento-based One Community Health argues in a lawsuit that the nonprofit health system failed to secure his data, as required by law. The complaint is seeking class action status.