Medical College of Wisconsin
Disclosed Nov 14, 2023240,667 affectedConfirmed
The covered entity (CE), Medical College of Wisconsin, reported that its third-party vendor experienced a cybersecurity incident that allowed unauthorized access to its server and compromised the protected health information (PHI) of 240,667 individuals. The PHI involved included names, addresses, Social Security numbers, dates of birth, claims information, diagnoses, lab results, and medications. The CE notified HHS, affected individuals, and the media. In its mitigation efforts, the CE provided credit monitoring services and terminated its business relationship with the vendor.
What is known
| People affected | 240,667 (as reported to HHS) |
|---|---|
| Disclosed | Nov 14, 2023 |
| Attack | Hacking |
| Data exposed | NamesHealth |
| Sector | Healthcare · US |
| Status | Confirmed |
Sources
Notices filed
Other breaches at Medical College of Wisconsin
History of this record
First seen 2026-09-25 (HHS archive), confirmed by HHS OCR. Record counts are as reported. Not legal advice.