Rouge Valley Health System (Ontario)
230K patient records including surgical notes exposed via compromised portal
Healthcare Data Breaches (742 indexed)
Concentra Health Services
Occupational health provider breach affecting hundreds of thousands of patient records
Elligence Health (Maryland)
550K Medicare Advantage patient records exposed via third-party data processor
Genea Fertility (Australia)
Patient reproductive health data and IVF records compromised in targeted attack
Sanford Health
1.5M patient records compromised in ransomware attack on Midwestern health system
Medibank (Continued Impact)
9.7M customer records from 2024 breach continue to surface on dark web — regulatory action ongoing
Youthmanual
937,912 records exposed — Bios, Dates of birth, Email addresses, Genders and 5 more
SouthCoast Health (Georgia)
468K patient records exposed in Medusa ransomware attack on regional health network
HealthMarket Insurance
420K policyholder records stolen including SSNs
Corewell Health
1M patient records compromised via business associate Welltok data breach spillover
Sanofi
560K clinical trial records exposed in targeted attack
Health PEI
92K patient records stolen in ransomware
Change Healthcare
190M health records — largest healthcare breach in US history
View incident → Indexed 1 year, 3 months ago
SSM Health
760K patient records stolen via compromised vendor portal at Missouri-based Catholic health system
Frederick Health
934K patient records exposed in ransomware attack
Mass General Brigham (Boston)
520K patient records exposed via compromised third-party scheduling vendor
Change Healthcare (Ongoing Fallout)
Continued discovery of exposed records — total revised upward to 190M affected individuals
Change Healthcare (2025 Update)
Updated count: 190M Americans affected — largest healthcare breach in US history confirmed
Ascension Health (Former Partner)
437K patient records stolen from former business partner system
BrightSpring Health Services
3.4M home health and pharmacy patient records exposed in ransomware incident
Conduent Business Services
10.5M individuals affected — SafePay ransomware targeting government health contracts
Concentra Health (2025)
890K patient records exposed in vendor platform breach
CommonSpirit Health (Follow-Up)
870K additional patient records identified from 2024 ransomware attack residual access
Sentara Healthcare (Virginia)
780K patient records exposed