Every public data breach

44 disclosed this week · 26,355 on record

Mass General Brigham Health Plan

Disclosed Jun 28, 20243,659 affectedConfirmed

Official notice

Mass General Brigham Health Plan, the covered entity (CE), reported that an employee impermissibly shared her system credentials with an unauthorized individual in an effort to outsource her job duties. This breach affected the protected health information (PHI) of 3,659 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, and diagnoses. 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 employee was sanctioned and all staff were retrained on the requirement to protect and secure sensitive data.

What is known

People affected3,659 (as reported to HHS)
DisclosedJun 28, 2024
AttackInsider
Data exposedNamesHealth
SectorHealthcare · US
StatusConfirmed

Sources

Notices filed

History of this record
attack2026-09-25
unknown to insiderby backfillSource
data_types2026-09-25
[] to ["names","health"]by backfillSource
records_basis2026-09-25
empty to hhsby backfillSource
records2026-09-25
empty to 3659by backfillSource
summary2026-09-25
empty to Mass General Brigham Health Plan, the covered entity (CE), reported that an employee impermissibly shared her system credentials with an unauthorized individual in an effort to outsource her job duties. This breach affected the protected heby backfillSource
Added2026-09-25
First recordedby backfillSource

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

Everything about Mass General Brigham Health Plan