Onsite Mammography Data Breach Investigation

The data breach lawyers at The Lyon Firm are investigating new claims of a data theft incident at Onsite Mammography, a Massachusetts-based company that provides imaging services to numerous hospitals and clinics across the country. If you have been notified by Onsite that your personal data or health information may have been compromised, it is prudent to take certain measures to minimize the risk of fraud and medical identity theft.

Contact our attorneys to discuss how to protect yourself following a data security incident and to consider taking legal action. We have filed dozens of data breach lawsuits on behalf of plaintiffs nationwide and have settled several cases involving negligent healthcare entities. Call for a free consultation and case review.

What Happened at Onsite Mammography?

Onsite Mammography, operating out of Westfield, Massachusetts, recently announced a security incident that has allegedly involving the protected health information of 357,265 individuals. Suspicious activity was reportedly identified in an employee’s email account in October 2024, which spurred an investigation into the matter.

A digital forensics team later confirmed unauthorized access to an email account in which health-related information may have been viewed and acquired. The type of personal and health data potentially leaked is not entirely known, but could include names, medical records, financial information and Social Security numbers or ID numbers.

Onsite Women’s Health partners with various healthcare providers to offer in-office breast health and imaging services, personalized risk assessments, comprehensive 3D mammography services, and automated Whole-Breast Ultrasound (ABUS). Onsite has over 150 locations across the nation.