4,943individuals
Hacking/IT IncidentUnder investigation
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
501individuals
Hacking/IT IncidentUnder investigation
54,570individuals
Hacking/IT IncidentArchived
104,071individuals
Hacking/IT IncidentUnder investigation
MA · Dec 12, 2025
Heywood Healthcare Inc. including Henry Heywood Memorial Hospital, Athol Memorial Hospital, and Heywood Medical Group, Inc. (“Heywood”)
Healthcare Provider
500individuals
Hacking/IT IncidentUnder investigation
1,629individuals
Unauthorized Access/DisclosureArchived
6,544individuals
Hacking/IT IncidentUnder investigation
1,309individuals
Unauthorized Access/DisclosureArchived
987individuals
Hacking/IT IncidentArchived
29,517individuals
Hacking/IT IncidentUnder investigation
4,519individuals
Hacking/IT IncidentUnder investigation
1,000individuals
Hacking/IT IncidentUnder investigation
2,511individuals
Hacking/IT IncidentUnder investigation
35,236individuals
Hacking/IT IncidentArchived
4,859individuals
Hacking/IT IncidentUnder investigation
94,131individuals
Hacking/IT IncidentUnder investigation
1,036individuals
Hacking/IT IncidentArchived
3,098individuals
Hacking/IT IncidentArchived
501individuals
Hacking/IT IncidentUnder investigation
20,641individuals
Hacking/IT IncidentUnder investigation
9,206individuals
Hacking/IT IncidentUnder investigation
5,901individuals
Hacking/IT IncidentUnder investigation
64,332individuals
Hacking/IT IncidentUnder investigation
1,332individuals
Unauthorized Access/DisclosureArchived
500individuals
Hacking/IT IncidentUnder investigation
73,720individuals
Hacking/IT IncidentUnder investigation
1,066individuals
Hacking/IT IncidentUnder investigation
1,697individuals
Hacking/IT IncidentArchived
4,000individuals
Hacking/IT IncidentArchived
113,232individuals
Hacking/IT IncidentUnder investigation
88,863individuals
Hacking/IT IncidentUnder investigation
2,187individuals
Hacking/IT IncidentArchived
543individuals
Hacking/IT IncidentUnder investigation
1,984individuals
Unauthorized Access/DisclosureUnder investigation
1,021individuals
Hacking/IT IncidentUnder investigation
111,815individuals
Hacking/IT IncidentUnder investigation
80,860individuals
Hacking/IT IncidentUnder investigation
1,000individuals
Unauthorized Access/DisclosureUnder investigation
54,712individuals
Hacking/IT IncidentUnder investigation
4,651individuals
Hacking/IT IncidentUnder investigation
913individuals
Hacking/IT IncidentArchived
319,177individuals
Hacking/IT IncidentUnder investigation
126,953individuals
Hacking/IT IncidentArchived
410,326individuals
Hacking/IT IncidentArchived
14,095individuals
Hacking/IT IncidentUnder investigation
92,845individuals
Hacking/IT IncidentArchived
5,207individuals
Hacking/IT IncidentUnder investigation
3,426individuals
Hacking/IT IncidentArchived
238,615individuals
Hacking/IT IncidentUnder investigation
27,174individuals
Hacking/IT IncidentArchived
70,555individuals
Hacking/IT IncidentUnder investigation
500individuals
Hacking/IT IncidentUnder investigation
21,834individuals
Hacking/IT IncidentUnder investigation
10,929individuals
Hacking/IT IncidentUnder investigation
1,559individuals
Unauthorized Access/DisclosureArchived
501individuals
Hacking/IT IncidentUnder investigation
6,376individuals
Unauthorized Access/DisclosureUnder investigation
25,784individuals
Hacking/IT IncidentUnder investigation
17,000individuals
Unauthorized Access/DisclosureArchived
2,238individuals
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.