• June 2025 •

Integrated Oncology Network Data Breach

Last Updated on July 1, 2025

If you received a notice that your information was compromised, you may be able to start a class action to collect money for the harm you’ve suffered.

• Keep reading for more information

At A Glance

What's Going On?: Attorneys need to hear from people affected by the Integrated Oncology Network data breach as they investigate whether a class action lawsuit can be filed.
What You Can Do: If you got a letter or email about the data breach, fill out the form on this page to learn more about the investigation and how you can help.
Does This Cost Anything?: It costs nothing to get in touch or to talk to someone about your rights.
What Can I Get?: If filed and successful, a class action lawsuit could provide consumers with money for any harm resulting from the breach.

Integrated Oncology Network Data Breach: Lawsuit Investigation

Attorneys working with ClassAction.org are looking into whether a class action lawsuit can be filed in light of the Integrated Oncology Network data breach.

As part of their investigation, they need to hear from individuals who received a notice stating they were impacted.

Integrated Oncology Network Security Incident: What Happened?

Integrated Oncology Network (ION), a Nashville-based company that owns and provides administrative services to oncology physician practices, has reported a data breach resulting from an email phishing incident. On May 9, 2025, Integrated Oncology Network completed an investigation into the incident, which led to unauthorized access to a small number of email and SharePoint accounts containing patient data between December 13 and December 16, 2024.

The accessed data might include names alongside addresses, dates of birth, financial account details, diagnoses, lab results, medications, treatment information, health insurance and claims information, provider names and treatment dates. For a few individuals, Social Security numbers might be involved in the Integrated Oncology Network data breach.

Notifications were sent to affected oncology practices on June 13, 2025, and starting June 27, 2025, Integrated Oncology Network began mailing letters to potentially impacted patients.

Patients of California Cancer Associates for Research and Excellence (cCARE), which was acquired by Integrated Oncology Network in April 2022, are believed to be affected as the practice's website links to ION's online data breach notice. Additionally, on June 27, 2025, California Cancer Associates for Research and Excellence - Fresno submitted a sample data breach notification letter (a copy of which can be seen below) to the California Attorney General's Office about the incident.

What You Can Do After the Integrated Oncology Network Data Breach

If your information was exposed in the data breach, attorneys want to hear from you. You may be able to start a class action lawsuit to recover compensation for loss of privacy, time spent dealing with the breach, out-of-pocket costs, and more.

A successful case could also force Integrated Oncology Network to ensure it takes proper steps to protect the information it was entrusted with.

Got a notice about the Integrated Oncology Network data breach? Fill out the form on this page today.