The Orange County Radiation Oncology Medical Group Data Breach: Reported Filing Facts

Orange County Radiation Oncology Medical Group is a specialized healthcare provider focused on cancer treatment and radiation therapy services. As a medical entity, the organization collects and maintains sensitive patient information, including personal identifiers, clinical health data, and insurance billing details necessary for coordinating complex medical care. This security incident was officially reported to the California Attorney General in 2025, confirming that unauthorized access to systems occurred. If you received a data breach notification letter from the medical group, it indicates that your personal or protected health information may have been involved in this event. We recommend carefully reviewing the correspondence you received to understand the specific steps the organization is taking to support affected individuals and the resources available to help protect your identity.

State

California

Breach date

December 13, 2024

Reported

July 15, 2025