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.
5,582
Disclosures in the tracker, all years
2,082
Of those, indexed in 2026
146
Added in October
23
Added in the last 7 days
7
Sectors covered
Source: LeakTrace disclosure tracker, 30 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
Critical15 Sep 2026
Yale New Haven Health
Healthcare · 5,500,000 records
Data breach affected 5.5 million patients' medical and personal information
15 Sep 2026
Critical15 Sep 2026
MCBS
Healthcare · 1,200,000 records
Data breach affected 1.2 million individuals' medical business information
15 Sep 2026
Critical15 Sep 2026
Medical Billing Company
Healthcare · 1,300,000 records
Ransomware attack exposed 1.3 million individuals' protected health data
15 Sep 2026
Critical15 Sep 2026
Change Healthcare
Healthcare · 100,000,000 records
2024 ransomware attack exposed sensitive healthcare data
15 Sep 2026
High14 Sep 2026
Centers Laboratory
Healthcare · 540,000 records
Data breach affects 540,000 individuals
14 Sep 2026
High14 Sep 2026
MCBS
Healthcare · 1,200,000 records
Data breach affects 1.2 million individuals
14 Sep 2026
High14 Sep 2026
Covenant Health
Healthcare · 480,000 records
Qilin ransomware attack impacted nearly 480,000 individuals
14 Sep 2026
High14 Sep 2026
Ransomware attack resulted in data
Healthcare · Records not stated
Ransomware attack resulted in data leak of patient information
14 Sep 2026
High14 Sep 2026
Organisation not named
Healthcare · Records not stated
The disclosure as indexed does not name the organisation.
Ransomware attack affecting government-run network of healthcare testing laboratories
14 Sep 2026
High14 Sep 2026
Bedfordshire Hospital
Healthcare · Records not stated
Patient names, NHS numbers, and test results compromised in cyber attack
14 Sep 2026
Critical14 Sep 2026
UnitedHealthcare
Healthcare · Records not stated
2024 cyberattack exposed sensitive data from millions of patients including health and insurance information
14 Sep 2026
Critical14 Sep 2026
Medical billing company (unnamed)
Healthcare · 1,300,000 records
2025 ransomware attack exposed sensitive protected health data on 1.3M people, leaked to dark web
14 Sep 2026
High14 Sep 2026
Highland Oncology Group
Healthcare · Records not stated
2025 ransomware attack on Arkansas-based cancer care practice resulted in settlement litigation
14 Sep 2026
Critical10 Sep 2026
Organisation not named
Healthcare · 6,400,000 records
The disclosure as indexed does not name the organisation.
Connor Jones reports: McKesson’s cyberattack last month affected roughly 6.4 million individuals, according to a public breach notification service. The breach notification service added data leaked by serial extortionists…
10 Sep 2026
High10 Sep 2026
McKesson
Healthcare · 6,404,340 records
6,404,340 records exposed, Dates of birth, Email addresses, Employers, Genders and 4 more
10 Sep 2026
Medium9 Sep 2026
Electronic health record company
Healthcare · Records not stated
Veradigm said access was limited to a specific interface, and did not impact the company’s broader environment such as its networks, servers or databases. The incident did not result in operational disruptions, the…
9 Sep 2026
Critical9 Sep 2026
Veradigm
Healthcare · Records not stated
Healthcare technology company Veradigm disclosed a data breach after a cybersecurity incident at one of its third-party vendors exposed patients' personal data.
9 Sep 2026
Medium2 Sep 2026
Bridget Byrne
Healthcare · Records not stated
Bridget Byrne reports: Luminis Health is experiencing a cybersecurity incident affecting certain systems across its organization, according to a Facebook post Tuesday. “Our priority remains providing safe, high-quality…
2 Sep 2026
Critical2 Sep 2026
Organisation not named
Healthcare · 9,500,000 records
The disclosure as indexed does not name the organisation.
The healthcare data company Aesto informed federal regulators this week that more than 9.5 million people had sensitive information leaked during a cyberattack last December.
2 Sep 2026
High2 Sep 2026
The US healthcare provider
Healthcare · Records not stated
The US healthcare provider confirmed that sensitive patient and employee data, alongside financial and business information, were exfiltrated by a third party
2 Sep 2026
Medium1 Sep 2026
Cybersecurity incident
Healthcare · Records not stated
Cybersecurity incident hit an Anne Arundel County hospital; reported as part of rising attacks on healthcare. Data exposure details limited in snippet.
1 Sep 2026
High1 Sep 2026
Novo Nordisk
Healthcare · Records not stated
Data breach tied to stolen GitHub access tokens; FulcrumSec cyber extortion group involved
1 Sep 2026
High1 Sep 2026
Astrana Health
Healthcare · Records not stated
Hackers used social engineering to access servers and steal private health information
1 Sep 2026
High1 Sep 2026
Novo Nordisk
Healthcare · Records not stated
Data breach tied to stolen GitHub access tokens; hardcoded credentials exploited
1 Sep 2026
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