Cancer Treatment Centers of America at Western Regional Medical Center
Disclosed Nov 26, 201841,948 affectedConfirmed
The covered entity (CE), Cancer Treatment Centers of America, reported that an employee was the victim of an email phishing attack affecting 41,948 individuals. The protected health information (PHI) involved included names, addresses, Social Security numbers, diagnoses/conditions, and treatment information. CTCA notified HHS, affected individuals, and the media. In its mitigation efforts, the CE implemented additional administrative and technical safeguards and retrained its staff. OCR obtained assurances that the CE implemented the corrective actions noted.
What is known
| People affected | 41,948 (as reported to HHS) |
|---|---|
| Disclosed | Nov 26, 2018 |
| Happened | May 2, 2018 |
| Attack | Hacking |
| Data exposed | NamesHealth |
| Sector | Healthcare · US |
| Status | Confirmed |
Sources
Notices filed
History of this record
First seen 2026-09-25 (California AG), confirmed by California AG. Record counts are as reported. Not legal advice.
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