Yuba Sutter Medical Center in California (Yuba Sutter) has notified its patients that it has suffered a recent ransomware attack that caused parts of its network to be incapacitated. As a result, patient files were unable to be accessed, and patient treatment was delayed.

The attack occurred on August 3, 2016, and clinical data and health information was encrypted. The data was backed up, and although patient treatment may have been delayed, it does not appear from reports that Yuba Sutter paid a ransom.

Patients affected by the ransomware are being notified of the incident. The compromised data includes names, billing information, insurance details, addresses, and telephone numbers.

Yuba Sutter is recommending that its patients watch for suspicious activity on accounts, to obtain a credit report and place a fraud alert with the credit bureaus.