Largest Healthcare Data Breaches of 2025
2025 was another bad year for healthcare data breaches. As of June, 2026, 2025, 772 healthcare data breaches affecting 500 or more individuals are listed on the Department of Health and Human Services (HHS) Office for Civil Rights (OCR) breach portal, involving the exposure or theft of the protected health information of 139,721,832 individuals. That total is likely to increase further as there are several data breach investigations that have yet to conclude. Based on the current totals, 2025 was the worst ever year for large healthcare data breaches, beating the previous record of 746 data breaches set in 2023 by 3.49%. In terms of affected individuals, 2025 was the third-worst year, behind the 289.8 million affected individuals in 2024 and the 183 million affected individuals in 2023. You can view the latest figures and how they compare to previous years on our Healthcare Data Breach Statistics page. Large healthcare data breaches increased by 4.18% year over year, although there was a 51.79% year-over-year decrease in affected individuals. Such a large decrease in affected...
Onsite Women’s Health $2.5M Data Breach Settlement
A breach of the email account of an employee of Onsite Women’s Health that exposed the protected health information of 357,265 individuals has resulted in a $2,525,000 settlement. Onsite Mammography, LLC, which does business as Onsite Women’s Health, a Westfield, Massachusetts-based provider of medical imaging services to hospitals, identified unauthorized access to an employee’s email account in October 2024. The email account was compromised as a result of a response to a phishing email, and while the account was only accessible for a short period of time, sensitive data was exfiltrated, including names, dates of birth, Social Security numbers, driver’s license numbers, credit card numbers, and information related to patients’ mental or physical conditions, and any care they received. Multiple class action lawsuits were filed in response to the data breach, which were consolidated – Clarkson, et al. v. Onsite Mammography, LLC, d/b/a Onsite Women’s Health – in the United States District Court District of Massachusetts. The consolidated lawsuit alleged that inadequate...
Conduent Business Services Data Breach Affected More Than 62.2 Million Individuals
In January 2025, news first surfaced about a massive data breach at Conduent Business Services, a vendor that provides printing, mailing, document processing, payment integrity, and other back-office services to healthcare providers, health plans, and government agencies. Conduent first identified the security breach on January 13, 2025; however, the forensic investigation determined that hackers had access to its computer network for three months, starting on October 21, 2024. At the time, the true scale of the breach was unknown. Based on breach reports submitted to the state attorneys general in Oregon and Texas, at least 25 million Americans were known to have been affected in those states alone; however, the full scale of the breach has only recently been confirmed. Conduent has provided an updated total to the Department of Health and Human Services Office for Civil Rights (OCR), indicating that the protected health information of at least 62,224,658 individuals was compromised in the incident. When a data breach occurs at a business associate of a HIPAA-covered entity, it is...
Clarinda Regional Health Center Reports Data Breach Affecting 24K Patients
Data breaches have been announced by Clarinda Regional Health Center in Iowa, Community Connections in DC, Waveny Lifecare Network in Connecticut, and NJ Pain Care Specialists in New Jersey. Clarinda Regional Health Center Clarinda Regional Health Center, a Clarinda, IA-based non-profit hospital, has started notifying 24,341 individuals about a recent cybersecurity incident that exposed sensitive data. Suspicious activity was identified within its computer network on December 15, 2026, and the forensic investigation determined that files containing patient data may have been accessed or acquired without authorization in October 2025. The LockBit5 ransomware group claimed responsibility for the incident. The file review confirmed that the exposed data included first and last names, dates of birth, medical information, health insurance information, financial account numbers, Social Security numbers, driver’s license numbers, and taxpayer identification numbers. The types of data varied from individual to individual. The review of the affected files was completed on May 21, 2026, and...
$3.3M Settlement Resolves Data Breach Lawsuit Against Mt. Baker Imaging & Northwest Radiologists
Mt. Baker Imaging and Northwest Radiologists have agreed to pay $3,300,000 to settle a consolidated class action lawsuit stemming from a January 2025 ransomware attack and data breach affecting hundreds of thousands of patients. Mt. Baker Imaging is a Washington-based medical imaging provider that uses Northwest Radiologists for interpreting medical images. In January 2025, a cyberattack was identified, and the forensic investigation determined that an unauthorized third party accessed its network between January 20, 2025, and January 25, 2025, and obtained files containing names, contact information, dates of birth, Social Security numbers, driver’s license or state identification card numbers, treatment or diagnosis information, and health insurance information. The data breach was reported to the Washington Attorney General as affecting 348,118 state residents, and the HHS’ Office for Civil Rights was informed that the protected health information of up to 362,713 individuals was compromised in the incident. Multiple class action lawsuits were filed in response to the data...



