Sierra Vista Hospital, a behavioral health facility in Sacramento, California, was targeted by the LockBit 5.0 ransomware group on June 9, 2026. This incident has led to investigations by law firms, though official notification from the hospital or regulatory bodies is still pending. The breach appears to be a direct attack on the hospital.
The breach potentially exposed various data types, including names, Social Security Numbers (SSN), addresses, payment information, phone numbers, service plans, payment histories, account details, and internal communications. The number of individuals affected has not yet been officially confirmed and is currently under investigation. Due to the involvement of SSN and payment information, this is considered a high-risk exposure involving financial and medical identifier data.
Details are still emerging. Official breach notifications or statements from Sierra Vista Hospital have not been publicly released as of June 25, 2026.