2,400individuals
Unauthorized Access/DisclosureArchived
The Signal Directory
Health Data Breach Tracker
Search every US health data breach of 500 or more people reported to HHS OCR since 2009. Filter by entity, type and date. Built from the OCR public breach portal.
Breaches listed
8,066
2009 to 2026
Individuals affected
1,106,146,271
sum of reported counts
Under investigation
open OCR cases
Top breach types
- 4,864
- 1,694
- 1,003
- 216
Monthly roundups
8,066 breaches
1,000individuals
TheftArchived
1,349individuals
Unauthorized Access/DisclosureArchived
1,400individuals
TheftArchived
860individuals
Hacking/IT IncidentArchived
15,478individuals
Hacking/IT IncidentArchived
707individuals
TheftArchived
2,814individuals
Unauthorized Access/DisclosureArchived
7,748individuals
Unauthorized Access/DisclosureArchived
3,179individuals
Hacking/IT IncidentArchived
25,000individuals
Unauthorized Access/DisclosureArchived
18,399individuals
Unauthorized Access/DisclosureArchived
824individuals
Hacking/IT IncidentArchived
625individuals
TheftArchived
743individuals
TheftArchived
1,980individuals
Hacking/IT IncidentArchived
10,700individuals
Unauthorized Access/DisclosureArchived
674individuals
Unauthorized Access/DisclosureArchived
1,000individuals
Unauthorized Access/DisclosureArchived
87,069individuals
Unauthorized Access/DisclosureArchived
6,890individuals
Hacking/IT IncidentArchived
1,000individuals
LossArchived
688individuals
Unauthorized Access/DisclosureArchived
21,880individuals
Hacking/IT IncidentArchived
500individuals
TheftArchived
1,025individuals
TheftArchived
651,971individuals
Unauthorized Access/DisclosureArchived
AZ · Aug 12, 2016
Valley Anesthesiology Consultants, Inc. d/b/a Valley Anesthesiology and Pain Consultants
Healthcare Provider
882,590individuals
Hacking/IT IncidentArchived
957individuals
Unauthorized Access/DisclosureArchived
533individuals
Unauthorized Access/DisclosureArchived
907individuals
Unauthorized Access/DisclosureArchived
3,466,120individuals
Hacking/IT IncidentArchived
13,237individuals
Hacking/IT IncidentArchived
23,015individuals
Hacking/IT IncidentArchived
992individuals
Unauthorized Access/DisclosureArchived
1,185individuals
Unauthorized Access/DisclosureArchived
3,620,000individuals
Hacking/IT IncidentArchived
201,000individuals
Unauthorized Access/DisclosureArchived
10,401individuals
Hacking/IT IncidentArchived
854individuals
TheftArchived
29,153individuals
Hacking/IT IncidentArchived
7,200individuals
Unauthorized Access/DisclosureArchived
2,844individuals
TheftArchived
DE · Jul 22, 2016
Ambucor Health Solutions, an unincorporated division of The ScottCare Corporation
Business Associate
1,679individuals
Unauthorized Access/DisclosureArchived
697individuals
Unauthorized Access/DisclosureArchived
7,784individuals
TheftArchived
2,000individuals
TheftArchived
TX · Jul 20, 2016
Memorial Hermann Health System, reporting on behalf of Memorial Hermann Health System Employee Group Health Plan
Health Plan
12,061individuals
Unauthorized Access/DisclosureArchived
4,831individuals
Hacking/IT IncidentArchived
1,326individuals
Unauthorized Access/DisclosureArchived
2,500individuals
TheftArchived
2,473individuals
Hacking/IT IncidentArchived
5,978individuals
Unauthorized Access/DisclosureArchived
1,945individuals
Hacking/IT IncidentArchived
850individuals
Unauthorized Access/DisclosureArchived
1,479individuals
Unauthorized Access/DisclosureArchived
1,136individuals
TheftArchived
17,100individuals
Hacking/IT IncidentArchived
1,100individuals
Hacking/IT IncidentArchived
1,835individuals
Unauthorized Access/DisclosureArchived
About this data
By Dr. Dereck Mush, MD, MBA, Editor In Chief
It currently holds 8,066 breaches, with submission dates from October 21, 2009 to October 9, 2026, and it refreshes every week from OCR's public breach portal.
We built it for the people who have to act on this data: health system CISOs and security teams benchmarking their own risk, compliance and privacy leads tracking how breaches are reported, and investors doing diligence on healthcare companies and their vendors.
Here's how to read it. Each row is a single report filed with OCR. It shows the covered entity, its state and entity type, the number of individuals affected, the breach type (for example hacking or IT incident, or unauthorized access), where the information was held, and the date it was submitted. Use the filters to narrow by submission date, entity type or breach type, and open any row for its detail page. The monthly roundups group new reports by submission month, so you can see what changed recently without scrolling the full list.
- Source. Every record comes from the HHS OCR breach portal, which lists breaches of unsecured protected health information affecting 500 or more individuals. We show the data as OCR reports it and don't add or change the reported facts. Any editorial note we add is labeled as ours.
- Under investigation vs archive. OCR keeps two lists. "Under investigation" lists HIPAA breaches reported within the last 24 months that are currently under investigation by the Office for Civil Rights. "Archive" holds resolved HIPAA breach reports and/or reports older than 24 months. A breach can move from one list to the other between weekly refreshes.
- Individuals affected. These are the counts reported to OCR. Entities can revise them, and the same person can appear in more than one breach, especially when a single vendor incident is reported separately by several covered entities. Adding the counts together will overstate the number of unique people affected.
- No implication of wrongdoing. A listing means a breach was reported to OCR. It doesn't mean the entity broke the law or was at fault beyond what OCR itself has published. Check OCR's own records for any finding, resolution or penalty.
- Updates. The tracker refreshes weekly. If you spot something that doesn't match OCR's portal, tell us and we'll check it against the source.
Source: HHS Office for Civil Rights Breach Portal. Latest submission in the data: Oct 9, 2026. Refreshed weekly from the portal.