1,024,731individuals
Hacking/IT IncidentArchived
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
850individuals
Hacking/IT IncidentArchived
656individuals
Unauthorized Access/DisclosureArchived
2,284individuals
Hacking/IT IncidentArchived
911individuals
Unauthorized Access/DisclosureArchived
733individuals
Improper DisposalArchived
24,000individuals
Hacking/IT IncidentArchived
197,986individuals
Hacking/IT IncidentArchived
2,568individuals
Unauthorized Access/DisclosureArchived
846individuals
Hacking/IT IncidentArchived
5,850individuals
Hacking/IT IncidentArchived
1,045individuals
Hacking/IT IncidentArchived
1,000individuals
Hacking/IT IncidentArchived
NY · Dec 17, 2018
University of Vermont Health Network - Elizabethtown Community Hospital
Healthcare Provider
32,470individuals
Hacking/IT IncidentArchived
500individuals
TheftArchived
588individuals
Unauthorized Access/DisclosureArchived
862individuals
Unauthorized Access/DisclosureArchived
900individuals
Hacking/IT IncidentArchived
1,000individuals
Unauthorized Access/DisclosureArchived
258,120individuals
Unauthorized Access/DisclosureArchived
117,905individuals
Hacking/IT IncidentArchived
2,122individuals
Improper DisposalArchived
1,912individuals
Unauthorized Access/DisclosureArchived
1,117individuals
Hacking/IT IncidentArchived
722individuals
Unauthorized Access/DisclosureArchived
435,339individuals
Unauthorized Access/DisclosureArchived
16,000individuals
Hacking/IT IncidentArchived
6,450individuals
Unauthorized Access/DisclosureArchived
599individuals
Unauthorized Access/DisclosureArchived
2,172individuals
Unauthorized Access/DisclosureArchived
16,276individuals
Hacking/IT IncidentArchived
2,652,537individuals
Hacking/IT IncidentArchived
47,984individuals
Hacking/IT IncidentArchived
AZ · Nov 26, 2018
Cancer Treatment Centers of America (CTCA) at Western Regional Medical Center
Healthcare Provider
41,948individuals
Hacking/IT IncidentArchived
1,971individuals
Unauthorized Access/DisclosureArchived
7,376individuals
Hacking/IT IncidentArchived
896individuals
Hacking/IT IncidentArchived
218,055individuals
Hacking/IT IncidentArchived
1,265individuals
Hacking/IT IncidentArchived
6,845individuals
Unauthorized Access/DisclosureArchived
165,800individuals
Hacking/IT IncidentArchived
20,371individuals
Hacking/IT IncidentArchived
7,012individuals
Hacking/IT IncidentArchived
128,400individuals
Hacking/IT IncidentArchived
500individuals
Hacking/IT IncidentArchived
5,000individuals
Unauthorized Access/DisclosureArchived
912individuals
Hacking/IT IncidentArchived
3,930individuals
Improper DisposalArchived
6,845individuals
Hacking/IT IncidentArchived
1,216individuals
Unauthorized Access/DisclosureArchived
543individuals
Unauthorized Access/DisclosureArchived
2,393individuals
Hacking/IT IncidentArchived
19,254individuals
Unauthorized Access/DisclosureArchived
4,458individuals
TheftArchived
5,019individuals
LossArchived
12,331individuals
Hacking/IT IncidentArchived
40,000individuals
Hacking/IT IncidentArchived
525individuals
LossArchived
TX · Nov 1, 2018
Dallas County Mental Health Mental Retardation Center dba Metrocare Services
Healthcare Provider
1,804individuals
Hacking/IT IncidentArchived
614individuals
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.