Mass General Brigham Medical Group Data Breach – Investigated by Federman & Sherwood
September 21, 2026 – Federman & Sherwood, a national consumer protection law firm, is investigating the Mass General Brigham Medical Group data breach following notifications filed with the Massachusetts Office of Consumer Affairs and Business Regulation.
According to the filings, two Massachusetts residents were affected, with additional individuals potentially affected nationwide. One filing identifies Social Security and driver’s license numbers as potentially affected, while the other identifies Social Security numbers.
Healthcare organizations maintain highly sensitive patient and personal information. The exposure of Social Security and driver’s license numbers may increase the risk of identity theft, fraudulent account creation, impersonation, and other forms of misuse.
Federman & Sherwood is investigating whether Mass General Brigham Medical Group implemented reasonable cybersecurity safeguards to protect sensitive information and whether additional measures could have prevented or reduced the impact of the data breach.
The potentially compromised information may include:
- Names
- Social Security numbers
- Medical information
- Health insurance information
- Other sensitive information
What is Mass General Brigham Medical Group?
Mass General Brigham Medical Group provides comprehensive patient care, primary care, and specialized medical services across a large network of outpatient clinics, community physicians, and world-class academic hospitals.
Individuals affected by the Mass General Brigham Medical Group data breach may have legal rights and are encouraged to contact Federman & Sherwood.
Phone: 1-800-237-1277 | Email: info@federmanlaw.com