Cierant
Disclosed Jul 3, 20251 year ago232,506 affectedConfirmed
What is known
| People affected | 232,506 (as reported to HHS) |
|---|---|
| Disclosed | Jul 3, 2025 |
| Discovered | Dec 10, 2024 |
| Happened | Dec 9, 2024 |
| Attack | Ransomware |
| Data exposed | Names, Health |
| Sector | Healthcare · US |
| Status | Confirmed |
Sources
| Source | |
|---|---|
| California Attorney General breach notice: Cierantoag.ca.gov · Official notice | Official notice |
| Washington Attorney General breach notice: Cierantatg.wa.gov · Official notice | Official notice |
| HHS OCR breach report: Cierant (Business Associate, CT)ocrportal.hhs.gov · Official notice | Official notice |
Notices filed
| Where | Filed | People |
|---|---|---|
| HHS OCRtotal | Jul 3, 2025 | 232,506 |
| California AGresidents of CA | Jul 7, 2025 | |
| Washington AGresidents of WA | Jul 7, 2025 | 530 |
| Washington AGresidents of WA | Jul 7, 2025 | 902 |
History of this record
- 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 232506 · backfill source
- 2026-09-25 · disclosed: 2025-07-07 to 2025-07-03 · backfill source
- 2026-09-25 · sector: other to health · backfill source
- 2026-09-25 · attack: unknown to ransomware · backfill source
- 2026-09-25 · discovered: empty to 2024-12-10 · 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.