Disclosure tracker › Healthcare disclosures
Intelligence · Disclosure tracker
Healthcare disclosures
Public breach disclosures from regulators, court filings, company notices and news reporting, each recorded with its date and a link to the original. Updated daily.
5,583
Disclosures in the tracker, all years
2,083
Of those, indexed in 2026
147
Added in October
22
Added in the last 7 days
7
Sectors covered
Source: LeakTrace disclosure tracker, 31 Oct 2026. Counts of records in the index, not estimates. Software advisories and security news are not counted.
5,552 results · Healthcare disclosures. Clear filters
Critical1 Aug 2026
Organisation not named
Healthcare · 1,260,000 records
The disclosure as indexed does not name the organisation.
1.26 million patients exposed in PEAR ransomware attack on medical billing company
1 Aug 2026
High1 Aug 2026
Aesto Health
Healthcare · Records not stated
Patient information exposed in data breach
1 Aug 2026
Critical1 Aug 2026
Brown Health Medical Group-MA
Healthcare · 311,000 records
311,000 people's personal, medical, and financial information stolen by hackers
1 Aug 2026
Critical1 Aug 2026
Madera Community Hospital
Healthcare · 150,000 records
Extortion group stole personal, financial, and medical information of 150,000 patients
1 Aug 2026
Critical1 Aug 2026
Healthcare billing company breach
Healthcare · 1,260,000 records
Healthcare billing company breach exposed sensitive data affecting 1.26 million people
1 Aug 2026
High1 Aug 2026
Synnovis/Mid South Essex NHS
Healthcare · 900,000 records
Major ransomware attack stole thousands of NHS patient records from Essex healthcare trust
1 Aug 2026
Critical1 Aug 2026
30M patient records stolen including 1M SSNs
Healthcare · 30,000,000 records
30M patient records stolen including 1M SSNs
1 Aug 2026
High1 Aug 2026
Synnovis/Essex NHS
Healthcare · 900,000 records
Ransomware attack stole thousands of patient records held by NHS trust in Essex; disclosed over 6 months after notification
1 Aug 2026
Critical1 Aug 2026
1 Aug 2026
Critical1 Aug 2026
MCBS
Healthcare · 1,200,000 records
Atlanta-based medical business management company data breach affected 1.2 million individuals
1 Aug 2026
High1 Aug 2026
Organisation not named
Healthcare · Records not stated
The disclosure as indexed does not name the organisation.
Thousands of patient records stolen during major ransomware attack disrupting healthcare services
1 Aug 2026
High1 Aug 2026
Essex NHS Trust
Healthcare · 900,000 records
Thousands of patient records stolen in cyber attack; disclosure delayed over 6 months
1 Aug 2026
High1 Aug 2026
Sandhills Medical Foundation
Healthcare · 170,000 records
Ransomware breach disclosed affecting approximately 170,000 individuals
1 Aug 2026
High1 Aug 2026
Legend Senior Care
Healthcare · Records not stated
Ransomware attack disclosed; affected senior care provider data
1 Aug 2026
High1 Aug 2026
Windward Life Care
Healthcare · Records not stated
Ransomware attack disclosed; affected senior care provider data
1 Aug 2026
Critical1 Aug 2026
Conduent Healthcare Systems
Healthcare · Records not stated
62M SSNs and medical records exposed
1 Aug 2026
Critical1 Aug 2026
Medical Computer Business Services
Healthcare · 1,300,000 records
1.3M patient health records leaked to dark web
1 Aug 2026
High1 Aug 2026
Years-long data breach of residents' private health-related information
Healthcare · Records not stated
Years-long data breach of residents' private health-related information
1 Aug 2026
High1 Aug 2026
Synnovis
Healthcare · 900,000 records
Ransomware attack on NHS trust in Essex stole thousands of patient records during major cyberattack
1 Aug 2026
High1 Aug 2026
Legend Senior Care
Healthcare · Records not stated
Ransomware attack disclosed; senior care provider data affected
1 Aug 2026
High1 Aug 2026
Windward Life Care
Healthcare · Records not stated
Ransomware attack disclosed; senior care provider data affected
1 Aug 2026
High1 Aug 2026
Thousands of NHS patient records
Healthcare · 900,000 records
Thousands of NHS patient records confirmed stolen during major ransomware cyberattack
1 Aug 2026
Critical1 Aug 2026
Organisation not named
Healthcare · 1,260,000 records
The disclosure as indexed does not name the organisation.
2025 network breach exposed sensitive healthcare billing data affecting 1.26 million people
1 Aug 2026
Critical1 Aug 2026
Organisation not named
Healthcare · Records not stated
The disclosure as indexed does not name the organisation.
Thousands of patient records stolen in major ransomware attack disrupting healthcare services
1 Aug 2026
Were you affected?