1,551individuals
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
769individuals
Unauthorized Access/DisclosureArchived
1,600individuals
Unauthorized Access/DisclosureArchived
501individuals
TheftArchived
1,399individuals
Improper DisposalArchived
12,172individuals
Improper DisposalArchived
8,450individuals
Unauthorized Access/DisclosureArchived
8,750individuals
Hacking/IT IncidentArchived
4,624individuals
Hacking/IT IncidentArchived
727individuals
Unauthorized Access/DisclosureArchived
939individuals
Unauthorized Access/DisclosureArchived
932individuals
Unauthorized Access/DisclosureArchived
1,716individuals
Unauthorized Access/DisclosureArchived
2,898individuals
Hacking/IT IncidentArchived
7,976individuals
TheftArchived
683individuals
Unauthorized Access/DisclosureArchived
1,506individuals
Unauthorized Access/DisclosureArchived
689individuals
Hacking/IT IncidentArchived
719individuals
LossArchived
811individuals
Hacking/IT IncidentArchived
720individuals
Unauthorized Access/DisclosureArchived
1,915individuals
TheftArchived
664individuals
Unauthorized Access/DisclosureArchived
1,469individuals
Unauthorized Access/DisclosureArchived
1,551individuals
Unauthorized Access/DisclosureArchived
836individuals
TheftArchived
5,806individuals
TheftArchived
1,617individuals
Hacking/IT IncidentArchived
2,493individuals
Unauthorized Access/DisclosureArchived
550individuals
Unauthorized Access/DisclosureArchived
1,300individuals
Hacking/IT IncidentArchived
1,715individuals
Hacking/IT IncidentArchived
16,562individuals
Hacking/IT IncidentArchived
1,200individuals
Unauthorized Access/DisclosureArchived
6,231individuals
Unauthorized Access/DisclosureArchived
12,789individuals
Hacking/IT IncidentArchived
10,500individuals
Unauthorized Access/DisclosureArchived
8,352individuals
Hacking/IT IncidentArchived
653individuals
Unauthorized Access/DisclosureArchived
1,069individuals
Hacking/IT IncidentArchived
1,359individuals
Unauthorized Access/DisclosureArchived
128,000individuals
Hacking/IT IncidentArchived
1,140individuals
Unauthorized Access/DisclosureArchived
13,004individuals
TheftArchived
3,275individuals
LossArchived
1,969individuals
Unauthorized Access/DisclosureArchived
939individuals
Unauthorized Access/DisclosureArchived
1,800individuals
Hacking/IT IncidentArchived
1,594individuals
TheftArchived
MO · Sep 16, 2017
The MS Center of Saint Louis and Mercy Clinic Neurology - Town and Country
Healthcare Provider
1,081individuals
Unauthorized Access/DisclosureArchived
26,000individuals
Unauthorized Access/DisclosureArchived
6,109individuals
Hacking/IT IncidentArchived
6,119individuals
Unauthorized Access/DisclosureArchived
66,000individuals
Hacking/IT IncidentArchived
876individuals
Unauthorized Access/DisclosureArchived
763individuals
Unauthorized Access/DisclosureArchived
1,697individuals
TheftArchived
28,012individuals
Hacking/IT IncidentArchived
3,370individuals
Hacking/IT IncidentArchived
609individuals
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.