20,866individuals
TheftArchived
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
709individuals
TheftArchived
144,780individuals
Hacking/IT IncidentArchived
21,112individuals
Hacking/IT IncidentArchived
18,968individuals
Hacking/IT IncidentArchived
5,441individuals
Hacking/IT IncidentArchived
2,405individuals
Hacking/IT IncidentArchived
TX · Sep 10, 2021
Central Texas Medical Specialists, PLLC dba Austin Cancer Centers
Healthcare Provider
36,503individuals
Hacking/IT IncidentArchived
504individuals
Hacking/IT IncidentArchived
826individuals
TheftArchived
23,907individuals
Hacking/IT IncidentArchived
304,000individuals
Hacking/IT IncidentArchived
3,664individuals
Hacking/IT IncidentArchived
2,494individuals
Hacking/IT IncidentArchived
2,238individuals
Hacking/IT IncidentArchived
835individuals
Hacking/IT IncidentArchived
616,211individuals
Hacking/IT IncidentArchived
CA · Sep 5, 2021
Resource Anesthesiology Association of California, a Medical Corporation
Healthcare Provider
2,700individuals
TheftArchived
1,999individuals
Hacking/IT IncidentArchived
AZ · Sep 3, 2021
Asarco Health, Dental, Vision, Flexible Spending, Non-Union Employee Benefits, and Retiree Medical Plans
Health Plan
28,000individuals
Hacking/IT IncidentArchived
1,738individuals
Unauthorized Access/DisclosureArchived
5,978individuals
Hacking/IT IncidentArchived
412,565individuals
Hacking/IT IncidentArchived
2,230individuals
Hacking/IT IncidentArchived
2,000individuals
Unauthorized Access/DisclosureArchived
655,384individuals
Hacking/IT IncidentArchived
15,208individuals
Hacking/IT IncidentArchived
11,000individuals
Hacking/IT IncidentArchived
4,450individuals
Hacking/IT IncidentArchived
35,000individuals
Hacking/IT IncidentArchived
33,994individuals
Unauthorized Access/DisclosureArchived
1,568individuals
Hacking/IT IncidentArchived
98,774individuals
Hacking/IT IncidentArchived
21,988individuals
Hacking/IT IncidentArchived
115,448individuals
Hacking/IT IncidentArchived
1,750individuals
Hacking/IT IncidentArchived
57,244individuals
Hacking/IT IncidentArchived
326,417individuals
Unauthorized Access/DisclosureArchived
25,491individuals
Hacking/IT IncidentArchived
48,742individuals
Hacking/IT IncidentArchived
26,144individuals
Hacking/IT IncidentArchived
48,344individuals
Unauthorized Access/DisclosureArchived
12,433individuals
Hacking/IT IncidentArchived
NH · Aug 17, 2021
Nashua Regional Cancer Center dba Radiation Center of Greater Nashua
Healthcare Provider
520individuals
Hacking/IT IncidentArchived
3,774individuals
Hacking/IT IncidentArchived
171,740individuals
Hacking/IT IncidentArchived
24,021individuals
Hacking/IT IncidentArchived
1,310individuals
Unauthorized Access/DisclosureArchived
4,642individuals
Unauthorized Access/DisclosureArchived
4,970individuals
Hacking/IT IncidentArchived
5,665individuals
Hacking/IT IncidentArchived
1,300,000individuals
Hacking/IT IncidentArchived
552individuals
Unauthorized Access/DisclosureArchived
3,550individuals
Hacking/IT IncidentArchived
922individuals
Hacking/IT IncidentArchived
914individuals
Hacking/IT IncidentArchived
1,707individuals
Hacking/IT IncidentArchived
1,400,000individuals
Hacking/IT IncidentArchived
47,200individuals
Hacking/IT IncidentArchived
10,333individuals
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.