HHS OCR report ยท 2016
Walmart Stores, Inc. data breach
OCR report facts
- Covered entity
- Walmart Stores, Inc.
- Entity type
- Healthcare Provider
- State
- Arkansas
- Individuals affected
- 4,800
- Submission date
- Mar 1, 2016
- Type of breach
- Unauthorized Access/Disclosure
- Location of breached information
- Electronic Medical Record
- Business associate present
- No
- Status
- Archive (closed)
OCR description
Walmart Stores, Inc. (Walmart), the covered entity (CE), discovered that a software change on its computer system caused a technical error that resulted in the electronic protected health information (ePHI) to be viewable on its online pharmacy account portal. This breach affected 4,800 individuals and the ePHI involved included names, addresses, phone numbers, email addresses, prescriptions, insurance information, treatment information and the last four digits of its patients' credit card n...
Text as published on the HHS OCR breach portal.
Frequently asked questions
How many people were affected by the Walmart Stores, Inc. data breach?
The report to HHS OCR lists 4,800 individuals affected.
When was it reported to HHS?
It was submitted to HHS OCR on Mar 1, 2016.
What type of breach was it?
The OCR portal lists the type of breach as Unauthorized Access/Disclosure, with the breached information located in: Electronic Medical Record.
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 Walmart Stores, Inc. 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 Walmart Stores, Inc..