Deanco Healthcare
Disclosed Jun 30, 20233 years ago269,847 affectedConfirmed
The covered entity (CE), Deanco Healthcare dba Mission Community Hospital, reported that it experienced a ransomware incident that affected the protected health information (PHI) of 269,847 individuals. The PHI involved included names, dates of birth, drivers’ license information, Social Security numbers, claims information, diagnoses, medications, and other treatment information. The CE notified HHS, affected individuals, the media, and posted substitute notice on its website. In response to the breach, the CE offered free credit monitoring to affected individuals and implemented additional technical safeguards to better protect its PHI. OCR provided technical assistance regarding the HIPAA Rules.
What is known
| People affected | 269,847 (as reported to HHS) |
|---|---|
| Disclosed | Jun 30, 2023 |
| Happened | May 1, 2023 |
| Attack | Hacking |
| Data exposed | Names, Health |
| Sector | Healthcare · US |
| Status | Confirmed |
Sources
| Source | |
|---|---|
| California Attorney General breach notice: Deanco Healthcareoag.ca.gov · Official notice | Official notice |
| HHS OCR breach report (archive, resolved): Deanco Healthcare (Healthcare Provider, CA)ocrportal.hhs.gov · Official notice | Official notice |
Notices filed
| Where | Filed | People |
|---|---|---|
| HHS archivetotal | Jun 30, 2023 | 269,847 |
| California AGresidents of CA | Nov 21, 2023 |
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 269847 · backfill source
- 2026-09-25 · disclosed: 2023-11-21 to 2023-06-30 · backfill source
- 2026-09-25 · summary: empty to The covered entity (CE), Deanco Healthcare dba Mission Community Hospital, reported that it experienced a ransomware incident that affected the protected health information (PHI) of 269,847 individuals. The PHI involved included names, date · 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.