Every public data breach

47 disclosed this week · 26,367 on record

Mount Desert Island Hospital

Disclosed Jun 5, 202329,952 affectedConfirmed

Official notice

The covered entity (CE), Mount Desert Island Hospital, reported that it was the subject of a ransomware attack that affected the protected health information (PHI) of 29,952 individuals. The PHI involved included names, addresses, Social Security numbers, dates of birth, claims and financial information, diagnoses/conditions, and medications. The CE notified HHS, the affected individuals, the media, and provided substitute notice. In response to the breach, the CE provided complimentary credit monitoring services and implemented additional administrative, technical, and security safeguards. Staff were retrained to better protect PHI.

What is known

People affected29,952 (as reported to HHS)
DisclosedJun 5, 2023
HappenedApr 28, 2023
AttackHacking
Data exposedNamesHealth
SectorHealthcare · US
StatusConfirmed

Sources

Notices filed

History of this record
attack2026-09-25
unknown to hackingby backfillSource
data_types2026-09-25
[] to ["names","health"]by backfillSource
records_basis2026-09-25
organization to hhsby backfillSource
records2026-09-25
26889 to 29952by backfillSource
summary2026-09-25
empty to The covered entity (CE), Mount Desert Island Hospital, reported that it was the subject of a ransomware attack that affected the protected health information (PHI) of 29,952 individuals. The PHI involved included names, addresses, Social Seby backfillSource
records_basis2026-09-25
empty to organizationby backfillSource
records2026-09-25
empty to 26889by backfillSource
disclosed2026-09-25
2023-06-30 to 2023-06-05by backfillSource
occurred2026-09-25
empty to 2023-04-28by 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 Mount Desert Island Hospital