Onsite Mammography
Data Breach Class Action Lawsuit

Posted: April 22, 2025 -- Attention, victims of the Onsite Mammography data breach.

Abington Cole + Ellery is investigating the data breach recently announced by Onsite Mammography.

Onsite Mammography Data Breach Summary:

Approximately 357,000 individuals were affected by the Onsite Mammography data breach.

Breached data may include, but is not necessarily limited to: personal and/or protected health information.

Onsite Mammography, a healthcare provider specializing in breast health and imaging services, recently announced a significant data breach that has drawn attention due to its impact on patient privacy. This incident, discovered on October 4, 2024, involved unauthorized access to an employee's email account, affecting the protected health information (PHI) of approximately 357,000 individuals. The breach highlights ongoing challenges in securing sensitive healthcare data and underscores the importance of robust cybersecurity measures in medical organizations.

The investigation reportedly revealed that the breach was contained to a single email account, with no evidence suggesting access to other systems within Onsite's network. If true, this containment is significant, as it reduced the potential for widespread data compromise. However, the review, which concluded on February 21, 2025, identified that the compromised email account contained specific health-related information about patients, classified as protected health information (PHI). This included details such as medical diagnoses and treatment information, which are sensitive and protected under healthcare regulations.

In response to the breach, Onsite Mammography reportedly implemented additional security measures to minimize the risk of similar incidents occurring in the future. The company also notified law enforcement. Furthermore, Onsite claims it has engaged the services of an outside data analytics vendor to conduct a comprehensive review of the impacted files, ensuring a thorough understanding of the exposed information.

As a result of the data breach, Onsite Mammography is offering 12 months of free credit monitoring and/or identity theft protection services to some affected individuals.

Additional information about the Onsite Mammography data breach may be found here: Onsite Mammography Data Breach Notification.

About Onsite Mammography:

Onsite Mammography, operating under the umbrella of Onsite Women's Health, is a healthcare company based in Westfield, Massachusetts, that provides breast health and imaging services within physician practices. The company partners with medical offices, particularly those specializing in obstetrics, gynecology, and multi-specialty care, to deliver screening services directly to patients. Services include 3D mammography, screening ultrasound, and risk assessment. Onsite Mammography manages all components of the breast health service, including staffing with certified radiologists and technologists, procuring and maintaining equipment, and handling patient communications and reports. This model is designed to increase patient access to breast cancer screening by offering services in a familiar medical setting, thereby encouraging adherence to annual screening recommendations.

For more information about steps you can take to possibly reduce the chances harm arising from a data breach, please review the following article: What are some steps you can take if you've been the victim of a data breach?

If you believe you are a victim of the Onsite Mammography data breach, and if you would like to volunteer to serve as a class representative in a class action lawsuit regarding this data breach, please submit your information via the form on this webpage. This website is not associated with nor authorized by Onsite Mammography or any affiliated companies. If you have received any other data breach notifications, you may to review Abington Cole + Ellery's current list of data breach investigations.