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.
5,299
Disclosures in the tracker, all years
2,012
Of those, indexed in 2026
58
Added in October
15
Added in the last 7 days
7
Sectors covered
Source: LeakTrace disclosure tracker, 18 Oct 2026. Counts of records in the index, not estimates. Software advisories and security news are not counted.
4,964 results · Healthcare disclosures. Clear filters
High1 Jun 2026
Essex NHS Trust
Healthcare · 900,000 records
Thousands of NHS patient records stolen in cyber attack; disclosure delayed over six months after notification.
1 Jun 2026
Critical1 Jun 2026
Veradigm
Healthcare · Records not stated
Electronic health records company; customer data stolen after hackers infiltrated vendor's systems.
1 Jun 2026
Critical1 Jun 2026
Qilin/Essex NHS Trust
Healthcare · 900,000 records
Ransomware attack resulted in stolen patient records; hospitals identifying and warning patients
1 Jun 2026
High1 Jun 2026
Huntsville Hospital Health System
Healthcare · Records not stated
Third-party data breach exposed patient information and health records affecting multiple hospital facilities.
1 Jun 2026
High1 Jun 2026
Huntsville Hospital
Healthcare · Records not stated
Patient health information compromised through third-party vendor data breach
1 Jun 2026
High1 Jun 2026
Essex NHS Trust
Healthcare · 900,000 records
Thousands of patient records stolen in cyber attack, breach disclosed over six months after notification
1 Jun 2026
High1 Jun 2026
Huntsville Hospital Health System
Healthcare · Records not stated
Patient data compromised in third-party breach related to Cerner system
1 Jun 2026
Critical1 Jun 2026
Novo Nordisk
Healthcare · Records not stated
Cyber extortion group claimed breach; over 1TB of data stolen, $25M extortion attempted
1 Jun 2026
Critical1 Jun 2026
Novo Nordisk
Healthcare · Records not stated
Cyber extortion group claimed theft of over 1 terabyte of data with $25 million extortion attempt
1 Jun 2026
High1 Jun 2026
Veradigm
Healthcare · Records not stated
Electronic health records company disclosed customer data stolen after hackers infiltrated vendor's systems
1 Jun 2026
High1 Jun 2026
Essex NHS Trust
Healthcare · 900,000 records
Thousands of patient records stolen in cyber attack, disclosed more than six months after notification
1 Jun 2026
High1 Jun 2026
Partnered Health
Healthcare · Records not stated
Australian GP network breach exposed patient records reaching dark web
1 Jun 2026
High1 Jun 2026
Huntsville Hospital Health System
Healthcare · Records not stated
Third-party data breach exposed patient information across hospital facilities
1 Jun 2026
Critical1 Jun 2026
Medical billing company
Healthcare · 1,300,000 records
2025 ransomware attack exposed sensitive health data on 1.3 million people leaked to dark web
1 Jun 2026
High1 Jun 2026
Partnered Health
Healthcare · Records not stated
Patient records exposed in breach at Australian primary healthcare provider network
1 Jun 2026
High1 Jun 2026
Huntsville Hospital Health System
Healthcare · Records not stated
Patient data compromised in third-party vendor breach, affecting multiple hospital facilities
1 Jun 2026
High1 Jun 2026
Bedfordshire Hospital
Healthcare · Records not stated
Patient names, NHS numbers and test results exposed in cyber attack affecting hospital patients
1 Jun 2026
High1 Jun 2026
Essex NHS Trust
Healthcare · 900,000 records
Thousands of patient records stolen in cyber attack, disclosed over six months after notification
1 Jun 2026
High1 Jun 2026
Veradigm
Healthcare · Records not stated
Electronic health records company confirms customer data stolen after hackers infiltrated vendor systems
1 Jun 2026
Critical1 Jun 2026
MCBS
Healthcare · 1,200,000 records
Medical business management company breach affected 1.2 million individuals
1 Jun 2026
Critical1 Jun 2026
Medical Billing Company
Healthcare · 1,300,000 records
Ransomware attack exposed sensitive protected health data on 1.3 million people
1 Jun 2026
Critical1 Jun 2026
Baylor Genetics
Healthcare · 2,800,000 records
2.8 million patients affected; exposed medical conditions, SSNs, and employee information
1 Jun 2026
Critical1 Jun 2026
McKesson
Healthcare · 284,000,000 records
Data breach confirmed; ShinyHunters claimed theft of 284 million records including PII and PHI
1 Jun 2026
High1 Jun 2026
Huntsville Hospital
Healthcare · Records not stated
Patient health information compromised via third-party vendor breach
1 Jun 2026
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