Signature Healthcare Services
Disclosed Apr 26, 20242 years ago14,696 affectedConfirmed
The business associate (BA), Signature Healthcare Services LLC, reported that it experienced a ransomware incident that affected the protected health information (PHI) of 14,696 individuals. The PHI involved included names, dates of birth, social security numbers, medical record numbers, services received, dates of services, and treating physicians. The BA notified HHS, affected individuals, the media, and posted substitute. In response to the breach, the BA offered free credit monitoring to affected individuals and implemented additional administrative and technical safeguards.
What is known
| People affected | 14,696 (as reported to HHS) |
|---|---|
| Disclosed | Apr 26, 2024 |
| Happened | Jan 27, 2024 |
| Attack | Hacking |
| Data exposed | Names, Health |
| Sector | Healthcare · US |
| Status | Confirmed |
Sources
| Source | |
|---|---|
| California Attorney General breach notice: Signature Healthcare Servicesoag.ca.gov · Official notice | Official notice |
| HHS OCR breach report (archive, resolved): Signature Healthcare Services (Business Associate, CA)ocrportal.hhs.gov · Official notice | Official notice |
Notices filed
| Where | Filed | People |
|---|---|---|
| California AGresidents of CA | Apr 26, 2024 | |
| HHS archivetotal | Apr 27, 2024 | 14,696 |
| California AGresidents of CA | Oct 4, 2024 |
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 14696 · backfill source
- 2026-09-25 · summary: empty to The business associate (BA), Signature Healthcare Services LLC, reported that it experienced a ransomware incident that affected the protected health information (PHI) of 14,696 individuals. The PHI involved included names, dates of birth, · backfill source
- 2026-09-25 · disclosed: 2024-10-04 to 2024-04-26 · 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.