The Golden State Radiation Oncology Data Breach: Incident Facts and Free Case Review
Golden State Radiation Oncology is a specialized healthcare provider focused on cancer treatment and radiation therapy services. As a medical facility, the organization maintains highly sensitive patient records, including detailed clinical histories, diagnostic imaging, and insurance billing information. In 2025, the company officially reported a data security incident to the California Attorney General, confirming that unauthorized access to their systems occurred. If you have received a formal data breach notification letter from the organization, it indicates that your personal or protected health information was likely contained within the impacted files. This notice is intended to inform you of the incident, the steps the provider is taking to secure their network, and the resources available to help you protect your identity and medical privacy.
- State
- California
- Breach date
- December 13, 2024
- Reported
- July 15, 2025
Related data breach cases
- ZZ Diag Probe
- Opportune LLP
- Partnership HealthPlan of California
- CallonDoc, Inc.
- Alliance Environmental Group, LLC
- Leggett & Platt, Incorporated Employee Benefits Plan
- Catalyst Physician Group
- Cornerstone Staffing Solutions, Inc.
- Suffolk Federal Credit Union
- ZHealth, Inc.
- Cambridge Mercantile Corp. (U.S.A.)
- Paradigm Healthcare Services
- Accela, Inc.
- zHealth, Inc.