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.
5,287
Disclosures in the tracker, all years
2,001
Of those, indexed in 2026
49
Added in October
9
Added in the last 7 days
7
Sectors covered
Source: LeakTrace disclosure tracker, 17 Oct 2026. Counts of records in the index, not estimates. Software advisories and security news are not counted.
4,911 results · Healthcare disclosures. Clear filters
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
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
High1 Sep 2026
Astrana Health
Healthcare · Records not stated
Data stolen from servers via social engineering attack; confidential information exposed
1 Sep 2026
Critical1 Sep 2026
Breach
Healthcare · 727,000 records
Breach exposed 727,000 patient and contact records; CNIL fined €500,000
1 Sep 2026
Critical1 Sep 2026
AdaptHealth
Healthcare · 4,099,999 records
Personal, health, and insurance information of 4.1 million people stolen from systems
1 Sep 2026
Critical1 Sep 2026
Astrana Health
Healthcare · Records not stated
Confidential patient data stolen after social engineering attack on servers
1 Sep 2026
Critical1 Sep 2026
AdaptHealth
Healthcare · 4,099,999 records
4.1 million people's personal, health, and insurance information stolen
1 Sep 2026
Critical1 Sep 2026
Astrana Health
Healthcare · Records not stated
Confidential patient data stolen via social engineering and ransomware attack
1 Sep 2026
Critical1 Sep 2026
Breach
Healthcare · 727,000 records
Breach exposed 727,000 patient and contact records; resulted in €500,000 CNIL fine.
1 Sep 2026
Critical1 Sep 2026
Veradigm
Healthcare · 3,500,000 records
Third-party breach exposed 3.5M patient records stolen by The Gentlemen ransomware gang
1 Sep 2026
High1 Sep 2026
Astrana
Healthcare · Records not stated
Cyberattack exposed confidential information at healthcare company
1 Sep 2026
Critical1 Sep 2026
Organisation not named
Healthcare · 727,000 records
The disclosure as indexed does not name the organisation.
French hospital breach exposed 727,000 patient and contact records
1 Sep 2026
Critical1 Sep 2026
Organisation not named
Healthcare · 727,000 records
The disclosure as indexed does not name the organisation.
727,000 patient and contact records exposed in breach, resulting in €500,000 CNIL fine
1 Sep 2026
Critical1 Sep 2026
AdaptHealth
Healthcare · 4,099,999 records
4.1 million individuals' personal, health, and insurance information stolen
1 Sep 2026
Were you affected?