Dignity Health Lassen Medical Clinic
Disclosed Dec 23, 20241 year ago64,946 affectedConfirmed
The covered entity (CE), Dignity Health Lassen Medical Clinic, reported that it experienced a ransomware incident that affected the protected health information (PHI) of 64,946 individuals. The PHI involved included names, addresses, dates of birth, social security numbers, drivers’ license numbers, and financial and health insurance information. The CE notified HHS, affected individuals, and the media. In response to the breach, the CE implemented additional administrative, technical, and security safeguards and provided free credit monitoring to affected individuals.
What is known
| People affected | 64,946 (as reported to HHS) |
|---|---|
| Disclosed | Dec 23, 2024 |
| Happened | Sep 17, 2024 |
| Attack | Hacking |
| Data exposed | Names, Health |
| Sector | Healthcare · US |
| Status | Confirmed |
Sources
| Source | |
|---|---|
| California Attorney General breach notice: Dignity Health Lassen Medical Clinicoag.ca.gov · Official notice | Official notice |
| HHS OCR breach report (archive, resolved): Dignity Health Lassen Medical Clinic (Healthcare Provider, CA)ocrportal.hhs.gov · Official notice | Official notice |
Notices filed
| Where | Filed | People |
|---|---|---|
| HHS archivetotal | Dec 23, 2024 | 64,946 |
| California AGresidents of CA | Mar 25, 2025 |
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: empty to hhs · backfill source
- 2026-09-25 · records: empty to 64946 · backfill source
- 2026-09-25 · disclosed: 2025-03-25 to 2024-12-23 · backfill source
- 2026-09-25 · summary: empty to The covered entity (CE), Dignity Health Lassen Medical Clinic, reported that it experienced a ransomware incident that affected the protected health information (PHI) of 64,946 individuals. The PHI involved included names, addresses, dates · backfill source
- 2026-09-25 · added · backfill source
First seen 2026-09-25 (California AG), confirmed by California AG. Record counts are as reported. Not legal advice.