Change Healthcare / UnitedHealth
190M patient records stolen in ALPHV ransomware attack — largest US healthcare breach
Healthcare Data Breaches (801 indexed)
Change Healthcare / UnitedHealth
190M patient records stolen in ALPHV ransomware attack
Cencora / AmerisourceBergen
1.4M patient pharmaceutical records exposed in data exfiltration
Sanford Health (South Dakota)
350K patient records from rural health network exposed — 47 clinic locations affected
United Surgical Partners Intl
360K patient records exposed
Village Health
43K patient records exposed in vendor breach
Hamilton Health Sciences (Ontario)
167K patient records compromised — ransomware forced ER diversion to other hospitals
Mayo Clinic (Minnesota)
1.4M patient records exposed in vendor breach
Baystate Health
62K patient records exposed in email compromise
Community Health Systems
6M patient records compromised via Fortra GoAnywhere MFT zero-day exploitation
Ernest Health
94K patient records exposed in ransomware across 30 hospitals
Viamedis / Almerys (France)
33M health insurance records stolen from two major French third-party payment providers
Lurie Children's Hospital (Chicago)
791K pediatric patient records exposed in Rhysida ransomware attack — systems down 6 weeks
Lurie Children's Hospital
790K pediatric patient records stolen in Rhysida ransomware
Ambulance Victoria
30,000+ employee records stolen by Agenda ransomware group
Denver Health
44K patient records exposed in vendor breach
Trillium Health Partners (Ontario)
420K patient records compromised in ransomware attack
Select Medical Holdings
380K patient records from rehabilitation hospitals exposed via compromised EHR vendor
Regal Medical Group
3.3M patient records exposed in data exfiltration incident
Montefiore Medical Center
260K patient records stolen by insider threat employee
Riverside Community Care
25K patient records exposed
Integris Health (Oklahoma)
2.4M patient records stolen — attackers emailed patients directly demanding payment
Anna Jaques Hospital (Massachusetts)
316K patient records exposed after Christmas Day ransomware attack — Money Message gang
Anna Jaques Hospital
316K patient records exposed in Christmas Day ransomware