Golden State Radiation Oncology data breach

Clerk's notes

Golden State Radiation Oncology, a California healthcare provider specializing in cancer treatment, officially reported a data security incident to the state's Attorney General on July 15, 2025.

This report confirms that unauthorized access to the organization's systems occurred on December 13, 2024. The exact nature of the breach and the specific scope of the information involved are currently under investigation.

If you have received a formal data breach notification letter from Golden State Radiation Oncology, it means that your personal information was likely contained within the impacted files. The notification is intended to inform you of the incident and the measures the provider is taking to secure their network, as well as resources available to help protect your privacy.

It is advisable for anyone who received such a letter to carefully review its contents. Remaining vigilant for any suspicious communications or unusual activity related to your personal accounts is a recommended protective step.

Given the ongoing investigation into this incident, understanding the potential implications for your data is important. Obtaining a free case review can help clarify your individual situation and any potential actions you might consider, without obligation.

If a notification letter about this breach reached you, see every California data breach on file or browse all cases.