Strauss Borrelli PLLC, a leading data breach law firm, is investigating Radiation Oncology Network of Southern California, LLC d/b/a Imperial Valley Radiation Oncology regarding its recent data breach. The Imperial Valley Radiation Oncology breach involved sensitive personal identifiable information and protected health information belonging to over 12,900 individuals.1
ABOUT RADIATION ONCOLOGY NETWORK OF SOUTHERN CALIFORNIA, LLC D/B/A IMPERIAL VALLEY RADIATION ONCOLOGY:
Imperial Valley Radiation Oncology is a cancer treatment organization located in El Centro, California.2 Focusing on Radiation Therapy, Imperial Valley Radiation Oncology has a highly skilled team of doctors, nurses and radiation therapists.3 Imperial Valley Radiation Oncology is a part of Integrated Oncology Network (“ION”), which is a physician management, radiation oncology management and cancer center development company that partners with hospitals and physicians.4,5
WHAT HAPPENED?
Recently, Imperial Valley Radiation Oncology reported to the Attorney General of California that it had experienced a data breach in which the sensitive personal identifiable information in its care may have been compromised.4 According to the breach notice, on June 13, 2025, Imperial Valley Radiation Oncology learned that an email phishing incident resulted in unauthorized access to patient information in a small number of email and SharePoint accounts.1 As a result, Imperial Valley Radiation Oncology launched an investigation to determine the nature of the incident.
Through its investigation, Imperial Valley Radiation Oncology confirmed that an unauthorized third party had obtained access to sensitive personal information in its systems during the breach between December 13 and December 16, 2024.1 As a result, Imperial Valley Radiation Oncology began a review of the data to determine what information had been impacted, as well as identify the specific individuals affected. The exact type of personal information potentially exposed has not been made publicly available by Imperial Valley Radiation Oncology. However, according to California state reporting guidelines, “personal information” can include the following types of information:
- Name
- Social Security number
- Driver’s license number, California identification card number, tax identification number, passport number, military identification number, or other unique identification number issued on a government document
- Account number or credit or debit card number, in combination with any required security code, access code, or password that would permit access to an individual’s financial account
- Medical information
- Health insurance information
- Unique biometric data, such as a fingerprint, retina, or iris image, used to authenticate a specific individual
- Genetic data
Recently, Imperial Valley Radiation Oncology began mailing data breach notification letters to impacted individuals. Based on the breach notice sent to California residents, Imperial Valley Radiation Oncology is providing affected individuals with a list of the specific types of sensitive information impacted and complimentary credit monitoring services. A link to the form breach notification letters that Imperial Valley Radiation Oncology filed with the Attorney General of California is below.
If you received a breach notification letter from Integrated Oncology Network on behalf of Radiation Oncology Network of Southern California, LLC d/b/a Imperial Valley Radiation Oncology:
We would like to speak with you about your rights and potential legal remedies in response to this data breach. Please fill out the form, below, or contact us at 872.263.1100 or sam@straussborrelli.com.
