Every public data breach

44 disclosed this week · 26,355 on record

Mass General Brigham

Disclosed Jun 28, 2024655 affectedConfirmed

Official notice

Mass General Brigham, the covered entity (CE), reported that several employees impermissibly shared their system credentials with an unauthorized individual in an effort to outsource their job duties. This breach affected the protected health information (PHI) of 655 individuals. The PHI involved included names, addresses, medical record numbers, dates of birth, email addresses, phone numbers, Social Security numbers, health insurance and claims information, diagnoses, and other treatment information. The CE notified HHS, affected individuals, the media, and posted substitute notice on its website. In its mitigation efforts, the CE provided complimentary credit monitoring services and established a call center for questions or concerns. In addition, the employees were sanctioned and all staff were retrained on the requirement to protect and secure sensitive data.

What is known

People affected655 (as reported to HHS)
DisclosedJun 28, 2024
AttackInsider
Data exposedNamesHealth
SectorHealthcare · US
StatusConfirmed

Sources

Notices filed

Other breaches at Mass General Brigham

History of this record
Added2026-09-25
First recordedby backfillSource

First seen 2026-09-25 (HHS archive), confirmed by HHS OCR. Record counts are as reported. Not legal advice.

Everything about Mass General Brigham