On June 27, 2025, Integrated Oncology Network (“ION”) filed official notice with the Attorney General of California after discovering that a data security incident affected the personal information of cCARE patients. In this notice, ION explains that the incident resulted in an unauthorized party being able to access consumers’ sensitive information, which includes their names, Social Security numbers, addresses, dates of birth, financial account information, diagnosis, lab results, medication, treatment information, health insurance and claims information, provider names, and dates of treatment. Upon completing its investigation, ION began sending out data breach notification letters to all individuals whose information was affected by the recent data security incident.
If you received a data breach notification from Integrated Oncology Network, it is essential you understand what is at risk and what you can do about it. A data breach lawyer can help you learn more about how to protect yourself from becoming a victim of fraud or identity theft, as well as discuss your legal options following the Integrated Oncology Network data breach. For more information, please see our recent piece on the topic here.
What Caused the Data Breach Affecting cCARE Patients?
The Integrated Oncology Network / cCARE data breach was only recently announced, and more information is expected in the near future. However, ION’s filing with the Attorney General of California provides some important information on what led up to the breach. ION also posted a notice on its website that provides additional information about the incident.
According to these sources, on May 9, 2025, ION completed its investigation into a data security incident. Evidently, the incident resulted in unauthorized access to patient information that was stored in email and SharePoint accounts. The period of unauthorized access was between December 13, 2024 and December 16, 2024.
After learning that sensitive consumer data was accessible to an unauthorized party, Integrated Oncology Network reviewed the compromised files to determine what information was leaked and which consumers were impacted. While the breached information varies depending on the individual, it may include your name, Social Security number, address, date of birth, financial account information, diagnosis, lab results, medication, treatment information, health insurance and claims information, provider names, and dates of treatment.
On June 13, 2025, provided notifications to oncology physician practices, including cCARE, that have patients whose information was affected.
On June 27, 2025, Integrated Oncology Network sent out data breach letters to anyone who was affected by the recent data security incident. These letters should provide victims with a list of what information belonging to them was compromised.
More Information About Integrated Oncology Network and cCARE
Integrated Oncology Network is a privately held, physician-led alliance of community oncology and urology practices headquartered in Nashville, Tennessee. Operating roughly 50 treatment centers in more than a dozen states, it offers management, reimbursement, technology, and clinical-support services that enable local providers to deliver radiation therapy, medical oncology, imaging, and related care. ION employs approximately 250 people and generates $80 million in annual revenue.
cCARE, formally known as California Cancer Associates for Research & Excellence, is a privately held oncology and hematology practice headquartered in San Diego, California. ZoomInfo data indicate the organization employs approximately 360 people across its clinical and administrative sites and records an estimated $43 million in annual revenue from outpatient cancer treatment, imaging, and related support services. cCARE operates the following facilities:
- cCARE Cancer Center: Chula Vista
- cCARE Cancer Center: Encinitas
- cCARE Cancer Center: Fresno
- cCARE Cancer Center: High Desert
- cCARE Cancer Center: La Jolla
- cCARE Cancer Center: Murrieta
- cCARE Cancer Center: Riverside
- cCARE Cancer Center: San Marcos
