400,000individuals
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
6,000individuals
Hacking/IT IncidentArchived
1,262individuals
Hacking/IT IncidentArchived
18,416individuals
Hacking/IT IncidentArchived
3,250individuals
Unauthorized Access/DisclosureArchived
30,642individuals
Hacking/IT IncidentArchived
2,763individuals
TheftArchived
12,000individuals
Hacking/IT IncidentArchived
1,500individuals
TheftArchived
14,000individuals
Hacking/IT IncidentArchived
16,440individuals
Unauthorized Access/DisclosureArchived
971individuals
Hacking/IT IncidentArchived
908individuals
Unauthorized Access/DisclosureArchived
7,300individuals
Hacking/IT IncidentArchived
5,524individuals
Hacking/IT IncidentArchived
2,903individuals
Hacking/IT IncidentArchived
42,161individuals
Hacking/IT IncidentArchived
1,300individuals
Hacking/IT IncidentArchived
7,186individuals
Hacking/IT IncidentArchived
2,143individuals
Hacking/IT IncidentArchived
3,472individuals
TheftArchived
40,000individuals
Hacking/IT IncidentArchived
885individuals
Unauthorized Access/DisclosureArchived
2,030individuals
Hacking/IT IncidentArchived
5,645individuals
TheftArchived
10,866individuals
TheftArchived
1,950individuals
Unauthorized Access/DisclosureArchived
35,253individuals
Hacking/IT IncidentArchived
85,874individuals
Hacking/IT IncidentArchived
7,175individuals
Hacking/IT IncidentArchived
2,988individuals
Hacking/IT IncidentArchived
23,578individuals
Hacking/IT IncidentArchived
1,808individuals
Unauthorized Access/DisclosureArchived
1,625individuals
Unauthorized Access/DisclosureArchived
12,029individuals
Hacking/IT IncidentArchived
TN · Jan 24, 2019
Unum Group, on behalf of its subsidiaries - Unum Life Insurance and Colonial Life & Accident Insurance
Health Plan
532individuals
Hacking/IT IncidentArchived
700individuals
TheftArchived
24,113individuals
Hacking/IT IncidentArchived
6,289individuals
TheftArchived
23,377individuals
Hacking/IT IncidentArchived
6,877individuals
Unauthorized Access/DisclosureArchived
6,092individuals
Hacking/IT IncidentArchived
7,206individuals
TheftArchived
76,000individuals
TheftArchived
1,086individuals
Hacking/IT IncidentArchived
70,799individuals
Hacking/IT IncidentArchived
1,002individuals
Unauthorized Access/DisclosureArchived
598individuals
Hacking/IT IncidentArchived
1,300individuals
Unauthorized Access/DisclosureArchived
2,266individuals
Hacking/IT IncidentArchived
1,211individuals
Unauthorized Access/DisclosureArchived
8,429individuals
Hacking/IT IncidentArchived
1,800individuals
Improper DisposalArchived
2,800individuals
Hacking/IT IncidentArchived
111,589individuals
Hacking/IT IncidentArchived
576individuals
Unauthorized Access/DisclosureArchived
31,300individuals
Hacking/IT IncidentArchived
684individuals
TheftArchived
4,309individuals
Hacking/IT IncidentArchived
85,874individuals
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.