HHS OCR report ยท 2023
Mayo Clinic data breach
OCR report facts
- Covered entity
- Mayo Clinic
- Entity type
- Healthcare Provider
- State
- Minnesota
- Individuals affected
- 1,152
- Submission date
- Nov 3, 2023
- Type of breach
- Unauthorized Access/Disclosure
- Location of breached information
- Network Server
- Business associate present
- No
- Status
- Archive (closed)
OCR description
Mayo Clinic, the covered entity (CE), reported that an employee inadvertently submitted the protected health information (PHI) of 1,152 individuals to an academic journal; the data was then published via the Internet. The PHI involved included names, dates of birth, lab results, medical records numbers, gender, race, and treatment information. The CE notified HHS and affected individuals. In its mitigation efforts, the CE implemented additional administrative safeguards to better protect PHI....
Text as published on the HHS OCR breach portal.
Other reports by Mayo Clinic
| Covered entity | State | Entity type | Individuals | Submitted | Type of breach | Status |
|---|---|---|---|---|---|---|
| Mayo Clinic | MN | Healthcare Provider | 1,869 | Mar 28, 2025 | Unauthorized Access/Disclosure | Archive (closed) |
| Mayo Clinic | MN | Healthcare Provider | 1,614 | Oct 5, 2020 | Unauthorized Access/Disclosure | Archive (closed) |
| Mayo Clinic | MN | Healthcare Provider | 1,902 | Mar 22, 2019 | Unauthorized Access/Disclosure | Archive (closed) |
| Mayo Clinic | MN | Healthcare Provider | 1,740 | Sep 8, 2010 | Theft | Archive (closed) |
Frequently asked questions
How many people were affected by the Mayo Clinic data breach?
The report to HHS OCR lists 1,152 individuals affected.
When was it reported to HHS?
It was submitted to HHS OCR on Nov 3, 2023.
What type of breach was it?
The OCR portal lists the type of breach as Unauthorized Access/Disclosure, with the breached information located in: Network Server.
Is the investigation still open?
No. The report is in the OCR portal archive, which holds reports where OCR has closed its review.
Is a breach notice letter from Mayo Clinic legitimate?
This site cannot verify letters. Check the sender against the organisation's official website and the HHS OCR breach portal, and avoid calling numbers or clicking links only listed in an unexpected message. See our guide on what to do after a data breach notice.
Source: HHS OCR Breach Portal, OCR export October 2026. Network USA is not affiliated with HHS or Mayo Clinic.