Cognizant TriZetto Provider Solutions
3.4M patient health records exposed via insurance eligibility verification portal
Healthcare Data Breaches (801 indexed)
Hospital Israelita Albert Einstein (Brazil)
340K patient records compromised
Baxter International
340K medical records exposed
Romanian Health Ministry
450K patient records compromised in ransomware
Corewell Health (Michigan)
1M patient records exposed via third-party vendor Welltok
Stryker Corporation
340K medical device records stolen
Memorial Sloan Kettering Cancer Center
190K patient oncology research records exposed via targeted spear-phishing campaign
United Surgical Partners
1.7M patient records compromised across 400+ facilities
Saskatchewan Health Authority
450K patient records stolen in ransomware
Henry Ford Health (Michigan)
890K patient records compromised in ransomware
Medibank Private (2025)
1.8M member records compromised in second breach
UnitedHealthcare (Optum)
4.3M claims records stolen via compromised Optum claims adjudication system
LifeBridge Health
540K patient records stolen in phishing-initiated breach
Bon Secours Mercy Health
680K patient records exposed via compromised medical coding vendor system
HonorHealth (Arizona)
340K patient records from emergency departments exposed via ransomware — Akira group
Karolinska University Hospital (Sweden)
310K patient records compromised
Novo Nordisk (Denmark)
450K patient records stolen
Intermountain Health (Utah)
1.8M patient records exposed via vendor compromise — largest Intermountain breach to date
Dubai Health Authority
670K patient records exposed in vendor breach
St. Joseph Healthcare (Hamilton)
210K patient records exposed in phishing attack
Omnicuris
215,298 records exposed — Email addresses, Geographic locations, Names, Phone numbers
Labrador-Grenfell Health
55K patient records compromised
DaVita Kidney Care
1.6M dialysis patient records exposed via vendor credential compromise
QIMR Berghofer (Australia)
Medical research data from 68K clinical trial participants exposed in targeted attack