UnitedHealthcare (Optum)
4.3M claims records stolen via compromised Optum claims adjudication system
Healthcare Data Breaches (742 indexed)
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
Erasmus Medical Center (Rotterdam)
280K patient records compromised
Apollo Hospitals (India)
1.5M patient records compromised in ransomware attack
Piedmont Healthcare
1.3M patient records exposed in third-party vendor breach
Children's Hospital of Philadelphia
185K pediatric patient records exposed via phishing — developmental assessment data included
Trinity Health (Michigan)
2.1M patient records exposed via compromised remote monitoring vendor — 97 hospitals affected
Aflac Incorporated
13M health insurance records compromised — largest healthcare breach of 2025
Smith & Nephew
210K surgical records compromised
Fortis Healthcare (India)
670K patient records compromised
NHS Dumfries and Galloway
Patient data published by INC Ransom group after Scottish health board refused to pay
Scripps Health (San Diego)
530K patient records re-exposed via legacy system — previously thought contained from 2021
Blue Cross Blue Shield of Massachusetts
490K member records exposed via compromised third-party billing vendor