HHS OCR report ยท 2019
Mayo Clinic data breach
OCR report facts
- Covered entity
- Mayo Clinic
- Entity type
- Healthcare Provider
- State
- Minnesota
- Individuals affected
- 1,902
- Submission date
- Mar 22, 2019
- Type of breach
- Unauthorized Access/Disclosure
- Location of breached information
- Other
- Business associate present
- No
- Status
- Archive (closed)
OCR description
The Mayo Clinic, the covered entity (CE), reported that an update to its mobile application software enabled users to access the electronic protected health information (ePHI) of 1,902 individuals. The ePHI involved included names, addresses, dates of birth, diagnoses, lab results, medications prescribed, and other treatment information. The CE notified HHS, affected individuals, the media, and posted substitute notice on its website. To fix this error, the CE revised its mobile applicatio...
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 | 1,152 | Nov 3, 2023 | 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 | 1,740 | 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 1,902 individuals affected.
When was it reported to HHS?
It was submitted to HHS OCR on Mar 22, 2019.
What type of breach was it?
The OCR portal lists the type of breach as Unauthorized Access/Disclosure, with the breached information located in: Other.
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.