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Investigation OpenCA AG filing · July 15, 2025

Memorial Radiation Oncology Medical Group Files 2025 Data Breach Report

Memorial Radiation Oncology Medical Group in California reported a data incident that occurred on December 13, 2024. The group filed official notice of this event on July 15, 2025, to regulators. Individuals who may have been impacted should review any official notices and consider general protective measures.

State
CA
Breach date
December 13, 2024
Reported
July 15, 2025

Memorial Radiation Oncology Medical Group, a healthcare provider based in California, has formally filed notice of a data security incident with state regulators. The breach event was identified as occurring on December 13, 2024, with the official filing date recorded as July 15, 2025.

The specific type of breach and the precise categories of personal information affected by this incident were not detailed in the public filing. The report indicates that the matter is currently under investigation. This means that both the organization and relevant authorities are continuing to assess the full scope and impact of the event.

Since the investigation is ongoing, the number of individuals potentially affected by this incident has not been specified in the publicly available records. Any individual who receives a direct notification from Memorial Radiation Oncology Medical Group should carefully review the contents of that letter for specific details relevant to their situation.

Individuals concerned about potential exposure of their personal information are generally advised to take proactive steps. This includes remaining vigilant by regularly monitoring financial accounts and credit reports for any unusual or unauthorized activity. Placing a fraud alert or security freeze on credit is a common recommendation if suspicious activity is detected or if significant concerns arise.

This information is provided from public regulatory filings and serves as a factual record of reported data security events. Its purpose is to assist individuals in verifying notifications they may receive and to provide transparent details derived directly from official sources.

What to do if you were affected

These general steps can help limit the risk of identity theft and fraud after any data breach.

  • Stay alert to targeted scams

    Be cautious of calls, texts, or emails that reference this breach. Legitimate organizations won't ask you to confirm sensitive details through an unsolicited message.

  • Keep your notification letter

    Save the notice you received. It documents that your information was involved and is often needed to enroll in any credit monitoring offered or to join a related legal claim.

What to know about the Memorial Radiation Oncology Medical Group data breach

Where can I see the official Memorial Radiation Oncology Medical Group breach notice?
Memorial Radiation Oncology Medical Group's report is published by the CA Attorney General: https://oag.ca.gov/privacy/databreach/list#memorial-radiation-oncology-medical-grou-2025-07-15 Compare it with the letter you received to confirm the dates and details match.
What should I do after getting the Memorial Radiation Oncology Medical Group data breach notice?
Keep the letter and the envelope, and note the date it arrived. Freeze your credit with Equifax, Experian and TransUnion, change any passwords the notice mentions, and sign up for any free credit monitoring the letter offers. Then check whether you may have a claim.
Is the Memorial Radiation Oncology Medical Group data breach letter legit or a scam?
A notice from Memorial Radiation Oncology Medical Group in the mail matches the breach Memorial Radiation Oncology Medical Group reported to the CA Attorney General on July 15, 2025. Check that the company name and dates in your letter match that filing. A real notice of data security incident won't ask for your password, Social Security number or a payment — if it does, contact Memorial Radiation Oncology Medical Group through a phone number or website you find yourself.
Did Memorial Radiation Oncology Medical Group offer free credit monitoring?
Check your letter from Memorial Radiation Oncology Medical Group. If free credit or identity monitoring is offered, the enrollment code and deadline are printed in the notice itself. Signing up doesn't waive any legal rights you may have.
Can I sue Memorial Radiation Oncology Medical Group over the data breach?
It depends on what was exposed, the law in CA and your own state, and whether you've been harmed. Most people take part through a class action rather than suing alone. Keep your notification letter — it's the proof that connects you to the breach.
Is there a Memorial Radiation Oncology Medical Group data breach class action lawsuit?
Law firms often open an investigation after a breach notice like this one, and a class action lawsuit may follow. This page doesn't confirm that a lawsuit has been filed against Memorial Radiation Oncology Medical Group. You usually don't have to join a class action to be included — if a settlement is reached, class members are notified and can file a claim.
How much could a Memorial Radiation Oncology Medical Group data breach settlement or claim be worth?
There is no set amount, and no Memorial Radiation Oncology Medical Group settlement is confirmed here. In past data breach settlements, payments depended on what data was exposed and on documented losses — fraud, out-of-pocket costs and time spent dealing with the breach. Keep receipts and records; they're what damages claims are built on.
Do I need a Memorial Radiation Oncology Medical Group data breach lawyer or attorney?
An attorney can read your notice and tell you whether a claim makes sense. A case review here is free, and data breach cases are usually handled on contingency, so there is no upfront cost.

Source: CA Attorney General filing

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