Where does the Memorial Radiation Oncology Medical Group case file come from?

Every entry is taken from the breach report Memorial Radiation Oncology Medical Group lodged with the California Attorney General. Nothing here is estimated.

Why do the incident date and the report date differ?

Companies usually investigate before they report. The gap between the two dates shows how long that took.

What does the records-affected figure count?

It is the number the company gave the state. It can cover residents of that state only, so the national total may be higher.

Does this case file change over time?

Yes. When a company files an update or a new state publishes its copy of the report, the dates and counts here are refreshed.

Case file

Case File: Memorial Radiation Oncology Medical Group Data Breach

This file collects the dated facts on record for the Memorial Radiation Oncology Medical Group incident. The state report is dated July 15, 2025. The incident itself is dated December 13, 2024.

Timeline

214 days separate the incident date from the date it was reported.

December 13, 2024Incident dateWhen the filing says the breach took place.
July 15, 2025Report filed in CaliforniaDate the notice was lodged with the California Attorney General.

Case facts

Filing state: California
Date reported: July 15, 2025
Incident date: December 13, 2024
Receiving office: California Attorney General

Case notes

Memorial Radiation Oncology Medical Group, based in California, has confirmed a data breach incident that took place on December 13, 2024. The organization publicly reported this event on July 15, 2025, detailing the incident in filings submitted to regulatory bodies.

The specific categories of personal information involved in this breach were not detailed in the public records available. However, affected individuals should be aware that their data may have been accessed during the incident.

As of the latest reports, the incident is still under active investigation. Further details regarding the nature and extent of the compromise are expected to emerge as the inquiry progresses.

Individuals who may be affected by this breach are advised to remain vigilant. Regularly monitor financial statements and credit reports for any suspicious activity, and be cautious of unsolicited communications requesting personal details. Consider placing a fraud alert or security freeze on your credit files.

This information is derived from public data breach notifications. Maintaining awareness of potential risks is a key step in protecting one's personal information.

Questions about this case file

Where does the Memorial Radiation Oncology Medical Group case file come from?: Every entry is taken from the breach report Memorial Radiation Oncology Medical Group lodged with the California Attorney General. Nothing here is estimated.
Why do the incident date and the report date differ?: Companies usually investigate before they report. The gap between the two dates shows how long that took.
What does the records-affected figure count?: It is the number the company gave the state. It can cover residents of that state only, so the national total may be higher.
Does this case file change over time?: Yes. When a company files an update or a new state publishes its copy of the report, the dates and counts here are refreshed.

California data breaches

Filing source: California Attorney General

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Timeline

Case facts

Case notes

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