The Mass General Brigham Incorporated Data Breach: Reported Filing Facts
Mass General Brigham Incorporated is a prominent integrated healthcare system that operates numerous hospitals, clinics, and research facilities. As a major provider of medical services, the organization collects and maintains highly sensitive personal information, including comprehensive health records, diagnostic data, and insurance details necessary for patient care and billing. In 2025, the company officially reported a data security incident to the New Hampshire Attorney General, confirming that unauthorized access to its systems occurred. If you received a data breach notification letter from Mass General Brigham, it indicates that your personal or protected health information may have been compromised during this event. This notification is intended to inform you of the incident and provide guidance on the steps you can take to protect your identity and medical privacy.
- State
- New Hampshire
- Reported
- October 23, 2025
What to do if you were affected
These general steps can help limit the risk of identity theft and fraud after any data breach.
Stay alert to targeted scams
Be cautious of calls, texts, or emails that reference this breach. Legitimate organizations won't ask you to confirm sensitive details through an unsolicited message.
Keep your notification letter
Save the notice you received. It documents that your information was involved and is often needed to enroll in any credit monitoring offered or to join a related legal claim.
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