Mount Desert Island Hospital
Disclosed Jun 5, 20233 years ago29,952 affectedConfirmed
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 affected | 29,952 (as reported to HHS) |
|---|---|
| Disclosed | Jun 5, 2023 |
| Happened | Apr 28, 2023 |
| Attack | Hacking |
| Data exposed | Names, Health |
| Sector | Healthcare · US |
| Status | Confirmed |
Sources
| Source | |
|---|---|
| Vermont Attorney General: 2023-06-30 Mount Desert Island Hospital Data Breach Notice to Consumersago.vermont.gov · Official notice | Official notice |
| Indiana Attorney General 2023 data breach report: Mount Desert Island Hospitalin.gov · Official notice | Official notice |
| HHS OCR breach report (archive, resolved): Mount Desert Island Hospital (Healthcare Provider, ME)ocrportal.hhs.gov · Official notice | Official notice |
Notices filed
| Where | Filed | People |
|---|---|---|
| Indiana AGresidents of IN | Jun 5, 2023 | 3 |
| Vermont AGresidents of VT | Jun 30, 2023 | |
| HHS archivetotal | Jun 30, 2023 | 29,952 |
History of this record
- 2026-09-25 · attack: unknown to hacking · backfill source
- 2026-09-25 · data_types: [] to ["names","health"] · backfill source
- 2026-09-25 · records_basis: organization to hhs · backfill source
- 2026-09-25 · records: 26889 to 29952 · backfill source
- 2026-09-25 · summary: 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 Se · backfill source
- 2026-09-25 · records_basis: empty to organization · backfill source
- 2026-09-25 · records: empty to 26889 · backfill source
- 2026-09-25 · disclosed: 2023-06-30 to 2023-06-05 · backfill source
- 2026-09-25 · occurred: empty to 2023-04-28 · backfill source
- 2026-09-25 · added · backfill source
First seen 2026-09-25 (Vermont AG), confirmed by Vermont AG. Record counts are as reported. Not legal advice.