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Regulator-posted notice

Breach notice filed by Cancer Treatment Centers of America at Midwestern Regional Medical Center (March 2021)

Organization named: Cancer Treatment Centers of America at Midwestern Regional Medical Center Provisional: identity as filed, not yet matched to the directory
Type as the source lists it: Hacking/IT Incident

What the sources say

HHS OCR breach portal (HIPAA breaches affecting 500 or more individuals) Primary notice

Posted on the HHS Office for Civil Rights breach portal with a submission date of March 19, 2021.

Organization as reported
Cancer Treatment Centers of America at Midwestern Regional Medical Center, IL
Entity type as reported
Healthcare Provider
Category as reported
Hacking/IT Incident
Location of information as reported
Email
Submission date
March 19, 2021
Observed by BreachRecords
2026-10-18 16:15 UTC (revision 12285, row:3424)
Archived copy
Held in the private archive (provenance)

Cancer Treatment Centers of America at Midwestern Regional Medical Center, the covered entity (CE), reported that an employee was the subject of an email phishing scheme that compromised the protected health information (PHI) of 104,808 individuals. The PHI involved included names, medical record numbers, health insurance information, and treatment information. The CE notified HHS, affected individuals, the media, and posted substitute notice on its website. In its mitigation efforts, the CE implemented additional administrative, technical, and security safeguards to better protect its sensitive data. All staff were retrained.

The source's own words, from the revision above.

Figures, per source

  • 104,808 individuals affected (total reported), according to the HHS Office for Civil Rights breach portal, source date March 19, 2021, revision observed 2026-10-18.

Each figure is one source's figure with the basis that source gave. Figures from different sources are shown side by side and are not added, averaged or chosen between.

Timeline

Source dates are the dates the sources give. Observation dates are when BreachRecords recorded each revision.

  • Submission date (HHS Office for Civil Rights breach portal)
  • Observed by BreachRecords (revision 12285)
  • Approved by a reviewer

Organizations linked by a reviewer

Archived evidence

  • 3dbc27dd5742e041cc1e7fe18cc669e2901fbd3b86b7007ed27948ff4d406e1f
    text/csv, 5,530,996 bytes, retrieved from HHS Office for Civil Rights breach portal, 2026-10-18 16:15 UTC. Archived privately · Provenance · Source page

Records reflect source filings as of the dates shown. BreachRecords is not a regulator.

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