8,100individuals
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
135,959individuals
Hacking/IT IncidentArchived
543individuals
Unauthorized Access/DisclosureArchived
15,535individuals
Unauthorized Access/DisclosureArchived
914individuals
Unauthorized Access/DisclosureArchived
1,070individuals
Unauthorized Access/DisclosureArchived
772individuals
Unauthorized Access/DisclosureArchived
3,736individuals
Hacking/IT IncidentArchived
102,800individuals
Hacking/IT IncidentArchived
7,264individuals
Hacking/IT IncidentArchived
1,112individuals
Hacking/IT IncidentArchived
738individuals
TheftArchived
304,399individuals
Hacking/IT IncidentArchived
2,333individuals
LossArchived
80,795individuals
Hacking/IT IncidentArchived
7,447individuals
Hacking/IT IncidentArchived
7,557individuals
Unauthorized Access/DisclosureArchived
4,950individuals
Hacking/IT IncidentArchived
3,127individuals
Hacking/IT IncidentArchived
1,084individuals
Hacking/IT IncidentArchived
13,600individuals
TheftArchived
6,073individuals
Hacking/IT IncidentArchived
129,571individuals
Hacking/IT IncidentArchived
2,553individuals
Hacking/IT IncidentArchived
19,908individuals
Hacking/IT IncidentArchived
26,234individuals
LossArchived
1,237individuals
Unauthorized Access/DisclosureArchived
1,593individuals
TheftArchived
1,974individuals
Hacking/IT IncidentArchived
MD · Jul 24, 2020
University of Maryland Faculty Physicians, Inc. / University of Maryland Medical Center
Healthcare Provider
33,896individuals
Hacking/IT IncidentArchived
80,176individuals
TheftArchived
25,554individuals
Hacking/IT IncidentArchived
1,505individuals
Unauthorized Access/DisclosureArchived
6,606individuals
Hacking/IT IncidentArchived
4,139individuals
Unauthorized Access/DisclosureArchived
537individuals
Hacking/IT IncidentArchived
78,070individuals
Hacking/IT IncidentArchived
69,777individuals
Hacking/IT IncidentArchived
723individuals
Unauthorized Access/DisclosureArchived
NY · Jul 16, 2020
The Puerto Rican Organization to Motivate, Enlighten, and Serve Addicts, Inc. (PROMESA)
Healthcare Provider
3,129individuals
Hacking/IT IncidentArchived
1,441individuals
Hacking/IT IncidentArchived
50,440individuals
Unauthorized Access/DisclosureArchived
1,708individuals
Hacking/IT IncidentArchived
1,853individuals
Unauthorized Access/DisclosureArchived
900individuals
Hacking/IT IncidentArchived
1,463individuals
TheftArchived
2,490individuals
Hacking/IT IncidentArchived
500individuals
TheftArchived
1,158individuals
Hacking/IT IncidentArchived
8,394individuals
Hacking/IT IncidentArchived
21,800individuals
Hacking/IT IncidentArchived
500individuals
Hacking/IT IncidentArchived
35,940individuals
Hacking/IT IncidentArchived
2,393individuals
Unauthorized Access/DisclosureArchived
7,000individuals
Hacking/IT IncidentArchived
651,527individuals
Hacking/IT IncidentArchived
656individuals
Hacking/IT IncidentArchived
2,794individuals
Unauthorized Access/DisclosureArchived
5,878individuals
Unauthorized Access/DisclosureArchived
6,265individuals
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.