783individuals
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
1,506individuals
Hacking/IT IncidentArchived
23,517individuals
Hacking/IT IncidentUnder investigation
31,742individuals
Hacking/IT IncidentArchived
1,695,382individuals
Hacking/IT IncidentUnder investigation
626individuals
Hacking/IT IncidentArchived
3,232individuals
Hacking/IT IncidentUnder investigation
20,000individuals
Hacking/IT IncidentUnder investigation
1,300individuals
Unauthorized Access/DisclosureArchived
607individuals
Hacking/IT IncidentUnder investigation
3,337individuals
Hacking/IT IncidentArchived
5,427individuals
Hacking/IT IncidentArchived
26,696individuals
Hacking/IT IncidentArchived
1,316individuals
Hacking/IT IncidentArchived
47,593individuals
Hacking/IT IncidentUnder investigation
705individuals
Unauthorized Access/DisclosureArchived
500individuals
Hacking/IT IncidentArchived
VA · Jul 13, 2025
Williamsburg Area Medical Assistance Corporation d/b/a Olde Towne Medical and Dental Center (OTMDC)
Healthcare Provider
2,567individuals
Hacking/IT IncidentUnder investigation
1,905,000individuals
Hacking/IT IncidentUnder investigation
7,864individuals
Hacking/IT IncidentUnder investigation
4,847individuals
Hacking/IT IncidentArchived
3,473individuals
Hacking/IT IncidentArchived
8,840individuals
Hacking/IT IncidentUnder investigation
2,008individuals
Hacking/IT IncidentArchived
3,324individuals
Hacking/IT IncidentUnder investigation
501individuals
Hacking/IT IncidentUnder investigation
10,000individuals
Hacking/IT IncidentUnder investigation
689individuals
Unauthorized Access/DisclosureArchived
GA · Jul 8, 2025
Ascension Health Services LLC dba Alpha Wellness & Alpha Medical Centre
Healthcare Provider
1,714individuals
Hacking/IT IncidentArchived
4,764individuals
Hacking/IT IncidentArchived
15,410individuals
Hacking/IT IncidentArchived
1,772individuals
Hacking/IT IncidentArchived
17,040individuals
Hacking/IT IncidentUnder investigation
232,506individuals
Hacking/IT IncidentUnder investigation
3,233individuals
Hacking/IT IncidentUnder investigation
2,060individuals
Hacking/IT IncidentUnder investigation
279,275individuals
Hacking/IT IncidentUnder investigation
29,430individuals
Hacking/IT IncidentUnder investigation
650individuals
Unauthorized Access/DisclosureArchived
1,419,091individuals
Hacking/IT IncidentUnder investigation
32,717individuals
Unauthorized Access/DisclosureUnder investigation
107,154individuals
Hacking/IT IncidentUnder investigation
1,432individuals
Unauthorized Access/DisclosureArchived
19,481individuals
Hacking/IT IncidentUnder investigation
2,219individuals
Hacking/IT IncidentArchived
991individuals
Hacking/IT IncidentArchived
CA · Jun 27, 2025
California Cancer Associates for Research and Excellence - Fresno
Healthcare Provider
7,670individuals
Hacking/IT IncidentArchived
CA · Jun 27, 2025
California Cancer Associates for Research and Excellence – High Desert
Healthcare Provider
17,250individuals
Hacking/IT IncidentArchived
CA · Jun 27, 2025
California Cancer Associates for Research and Excellence – San Diego
Healthcare Provider
638individuals
Hacking/IT IncidentArchived
976individuals
Hacking/IT IncidentArchived
318,150individuals
Hacking/IT IncidentArchived
2,413individuals
Hacking/IT IncidentArchived
8,270individuals
Hacking/IT IncidentArchived
4,289individuals
Hacking/IT IncidentArchived
2,130individuals
Hacking/IT IncidentArchived
145,269individuals
Hacking/IT IncidentArchived
210,901individuals
Hacking/IT IncidentArchived
4,174individuals
Hacking/IT IncidentArchived
15,142individuals
Hacking/IT IncidentArchived
4,403individuals
Hacking/IT IncidentArchived
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.