15,287individuals
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
688,603individuals
Hacking/IT IncidentArchived
30,842individuals
Hacking/IT IncidentArchived
550,828individuals
Hacking/IT IncidentArchived
125,291individuals
Hacking/IT IncidentArchived
718individuals
Hacking/IT IncidentArchived
1,612individuals
Hacking/IT IncidentArchived
1,657individuals
Hacking/IT IncidentArchived
2,649individuals
Hacking/IT IncidentArchived
645individuals
Unauthorized Access/DisclosureArchived
TX · Mar 23, 2021
Dallas County Hospital District d/b/a Parkland Health & Hospital System
Healthcare Provider
1,566individuals
Unauthorized Access/DisclosureArchived
21,714individuals
Hacking/IT IncidentArchived
86,000individuals
Hacking/IT IncidentArchived
8,848individuals
Unauthorized Access/DisclosureArchived
614individuals
Hacking/IT IncidentArchived
2,714individuals
Unauthorized Access/DisclosureArchived
IL · Mar 19, 2021
Cancer Treatment Centers of America at Midwestern Regional Medical Center
Healthcare Provider
104,808individuals
Hacking/IT IncidentArchived
161,698individuals
Hacking/IT IncidentArchived
9,050individuals
Hacking/IT IncidentArchived
85,000individuals
Hacking/IT IncidentArchived
528individuals
Hacking/IT IncidentArchived
1,634individuals
TheftArchived
521individuals
Hacking/IT IncidentArchived
1,502individuals
Unauthorized Access/DisclosureArchived
2,347individuals
Unauthorized Access/DisclosureArchived
2,410individuals
Hacking/IT IncidentArchived
1,049individuals
Hacking/IT IncidentArchived
5,014individuals
Unauthorized Access/DisclosureArchived
720individuals
Unauthorized Access/DisclosureArchived
994individuals
Unauthorized Access/DisclosureArchived
517individuals
Unauthorized Access/DisclosureArchived
642individuals
Hacking/IT IncidentArchived
658individuals
Unauthorized Access/DisclosureArchived
26,609individuals
Hacking/IT IncidentArchived
39,602individuals
Hacking/IT IncidentArchived
907individuals
Unauthorized Access/DisclosureArchived
NY · Mar 10, 2021
Assistcare Home Health Services LLC dba Preferred Home Care of NY/Preferred Gold
Healthcare Provider
57,345individuals
Hacking/IT IncidentArchived
65,403individuals
Unauthorized Access/DisclosureArchived
34,878individuals
Hacking/IT IncidentArchived
717individuals
LossArchived
2,716individuals
Hacking/IT IncidentArchived
2,745individuals
Hacking/IT IncidentArchived
28,658individuals
Hacking/IT IncidentArchived
500individuals
TheftArchived
IL · Mar 5, 2021
The Board of Trustees of Southern Illinois University, for and on behalf of its School of Medicine, and SIU Physicians & Surgeons, Inc.
Healthcare Provider
40,330individuals
Hacking/IT IncidentArchived
PA · Mar 5, 2021
University of Pittsburgh Medical Center, St. Margaret Hospital (“UPMC St. Margaret”)
Healthcare Provider
11,135individuals
Unauthorized Access/DisclosureArchived
2,071individuals
Hacking/IT IncidentArchived
233,199individuals
Hacking/IT IncidentArchived
39,213individuals
Hacking/IT IncidentArchived
134,906individuals
Hacking/IT IncidentArchived
87,761individuals
Hacking/IT IncidentArchived
34,978individuals
Hacking/IT IncidentArchived
1,975individuals
Hacking/IT IncidentArchived
7,406individuals
Hacking/IT IncidentArchived
873individuals
Hacking/IT IncidentArchived
50,509individuals
Hacking/IT IncidentArchived
1,008individuals
Hacking/IT IncidentArchived
38,387individuals
Hacking/IT IncidentArchived
2,872individuals
Unauthorized Access/DisclosureArchived
33,932individuals
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.