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Onsite Mammography Data Breach Investigation
Shamis & Gentile P.A., one of the nation's premier class action law firms specializing in data breach cases, is investigating the Onsite Mammography data breach that has impacted 357,265 people.
If you were affected by the data breach, your sensitive personally identifiable information may have been exposed, and you may be eligible for compensation.
About Onsite Mammography
Onsite Mammography is a healthcare company focused on providing advanced breast health imaging and risk assessment services. Headquartered in Westfield, Massachusetts, the company partners with OB/GYNs, primary care physicians, and physician groups to offer in-office mammography, breast ultrasound, and risk assessment for women across the United States.
Founded in 2008, Onsite Mammography has grown significantly, with a workforce of over 160 employees as of 2025. The company is currently owned by Olympus Partners, a private equity firm, and operates a national network to improve access to breast cancer screening and early detection.
What Happened?
In April 2025, Onsite Mammography discovered a data breach that affected the personal information of patients. The breach was identified on April 15, 2025, and was disclosed to various state attorney general's offices beginning on April 22, 2025.
According to official reports, a total of 357,265 people in the United States were affected.
Impact by State:
- Maine: 32 residents
- Massachusetts: 89 residents
- South Carolina: 6,925 residents
- Texas: 31,663 residents
What types of information was exposed?
According to various state attorney general disclosures:
- Social Security Number Information
- Dates of Birth
- Health-related information about patients.
Your Rights and Next Steps
If you received a notice from Onsite Mammography, or if you believe your information may have been involved in this breach, there are important steps you can take. First, review any communications you have received from the company about the breach. These notices will provide details about what information was exposed and any protective measures being offered.
You have the right to know what data of yours was compromised and to seek support in protecting your identity and health information. You may also be entitled to free credit monitoring or identity theft protection services, depending on the specifics of the breach and the company’s response.
Most importantly, you have the right to seek compensation if your sensitive information was exposed. Lawyers are ready to help you understand your options, answer your questions, and guide you through the process of joining a class action lawsuit or pursuing individual claims.
You May Be Entitled to Compensation
If your health-related information was exposed in the Onsite Mammography data breach, you may be eligible for compensation. Lawyers are ready to help you assert your rights and hold the responsible parties accountable.
To find out if you qualify and to take the next step, complete the below form to join the lawsuit.
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