HHS OCR report ยท 2025
Orange County Radiation Oncology Medical Group data breach
OCR report facts
- Covered entity
- Orange County Radiation Oncology Medical Group
- Entity type
- Healthcare Provider
- State
- California
- Individuals affected
- 1,911
- Submission date
- Jun 27, 2025
- Type of breach
- Hacking/IT Incident
- Location of breached information
- Business associate present
- Yes
- Status
- Archive (closed)
OCR description
Orange County Radiation Oncology Medical Group, the covered entity (CE) reported that employees of its business associate (BA) were the targets of an email phishing scheme that impacted the protected health information (PHI) of 1,911 individuals. The PHI involved demographic and treatment information. The BA notified HHS, affected individuals, and the media on behalf of the CE. OCR provided technical assistance regarding the HIPAA Rules. In its mitigation efforts, the CE and BA implemented ...
Text as published on the HHS OCR breach portal.
Frequently asked questions
How many people were affected by the Orange County Radiation Oncology Medical Group data breach?
The report to HHS OCR lists 1,911 individuals affected.
When was it reported to HHS?
It was submitted to HHS OCR on Jun 27, 2025.
What type of breach was it?
The OCR portal lists the type of breach as Hacking/IT Incident, with the breached information located in: Email.
Is the investigation still open?
No. The report is in the OCR portal archive, which holds reports where OCR has closed its review.
Is a breach notice letter from Orange County Radiation Oncology Medical Group legitimate?
This site cannot verify letters. Check the sender against the organisation's official website and the HHS OCR breach portal, and avoid calling numbers or clicking links only listed in an unexpected message. See our guide on what to do after a data breach notice.
Source: HHS OCR Breach Portal, OCR export October 2026. Network USA is not affiliated with HHS or Orange County Radiation Oncology Medical Group.