824individuals
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
78,984individuals
Hacking/IT IncidentArchived
2,317individuals
Unauthorized Access/DisclosureArchived
20,216individuals
Hacking/IT IncidentArchived
8,834individuals
Unauthorized Access/DisclosureArchived
625individuals
Hacking/IT IncidentArchived
741individuals
Unauthorized Access/DisclosureArchived
76,571individuals
Hacking/IT IncidentArchived
584individuals
Unauthorized Access/DisclosureArchived
147,826individuals
Hacking/IT IncidentArchived
990individuals
Unauthorized Access/DisclosureArchived
215,632individuals
Hacking/IT IncidentArchived
986individuals
TheftArchived
566individuals
Hacking/IT IncidentArchived
62,777individuals
Hacking/IT IncidentArchived
1,127individuals
Unauthorized Access/DisclosureArchived
1,136individuals
Unauthorized Access/DisclosureArchived
8,500individuals
Hacking/IT IncidentArchived
2,454individuals
Hacking/IT IncidentArchived
617,901individuals
Hacking/IT IncidentArchived
537individuals
Hacking/IT IncidentArchived
740individuals
Hacking/IT IncidentArchived
21,325individuals
Hacking/IT IncidentArchived
36,600individuals
Hacking/IT IncidentArchived
239,039individuals
Hacking/IT IncidentArchived
11,595individuals
Hacking/IT IncidentArchived
13,752individuals
Hacking/IT IncidentArchived
4,212,823individuals
Hacking/IT IncidentArchived
4,158individuals
Hacking/IT IncidentArchived
12,222individuals
Hacking/IT IncidentArchived
3,909individuals
Hacking/IT IncidentArchived
1,337individuals
Hacking/IT IncidentArchived
185,459individuals
Hacking/IT IncidentArchived
2,673individuals
Unauthorized Access/DisclosureArchived
3,045individuals
Hacking/IT IncidentArchived
14,335individuals
Hacking/IT IncidentArchived
7,558individuals
Improper DisposalArchived
25,464individuals
Hacking/IT IncidentArchived
1,618individuals
Hacking/IT IncidentArchived
634individuals
Unauthorized Access/DisclosureArchived
433,348individuals
Hacking/IT IncidentArchived
3,840individuals
Hacking/IT IncidentArchived
54,509individuals
Hacking/IT IncidentArchived
1,435individuals
Hacking/IT IncidentArchived
5,327individuals
Hacking/IT IncidentArchived
AZ · Feb 1, 2023
Arizona Health Advantage dba Arizona Priority Care and AZPC Clinics
Healthcare Provider
10,978individuals
Hacking/IT IncidentArchived
CA · Feb 1, 2023
Regal Medical Group,Lakeside Medical Organization, ADOC Acquisition, & Greater Covina Medical Group
Healthcare Provider
3,388,856individuals
Hacking/IT IncidentArchived
AZ · Feb 1, 2023
The Institute for Liver Health dba Arizona Liver Health-Arizona Clinical Trials
Healthcare Provider
1,277individuals
Hacking/IT IncidentArchived
1,554individuals
Unauthorized Access/DisclosureArchived
597individuals
TheftArchived
6,465individuals
Hacking/IT IncidentArchived
29,119individuals
Hacking/IT IncidentArchived
794individuals
Hacking/IT IncidentArchived
10,000individuals
Hacking/IT IncidentArchived
115,241individuals
Hacking/IT IncidentArchived
53,668individuals
Hacking/IT IncidentArchived
3,381individuals
Hacking/IT IncidentArchived
50,000individuals
Hacking/IT IncidentArchived
2,674individuals
TheftArchived
512individuals
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.