Health Plan of San Joaquin
Disclosed Dec 21, 20205 years ago418,842 affectedConfirmed
The covered entity (CE), Health Plan of San Joaquin, reported that several employees were the victims of an email phishing scheme that affected the electronic protected health information (ePHI) of 418,842 individuals. The ePHI involved included names, Social Security numbers, drivers’ license numbers, health insurance information, claims and financial information, dates of birth, lab results, prescription information, and other treatment information. The CE notified HHS, affected individuals, the media, and provided substitute notice on its website. The CE also offered complimentary credit monitoring services. In response to the breach, the CE updated its email access protocols and implemented additional technical safeguards.
What is known
| People affected | 418,842 (as reported to HHS) |
|---|---|
| Disclosed | Dec 21, 2020 |
| Happened | Sep 26, 2020 |
| Attack | Hacking |
| Data exposed | Names, Health |
| Sector | Healthcare · US |
| Status | Confirmed |
Sources
| Source | |
|---|---|
| California Attorney General breach notice: Health Plan of San Joaquinoag.ca.gov · Official notice | Official notice |
| HHS OCR breach report (archive, resolved): Health Plan of San Joaquin (Health Plan, CA)ocrportal.hhs.gov · Official notice | Official notice |
Notices filed
| Where | Filed | People |
|---|---|---|
| HHS archivetotal | Dec 21, 2020 | 418,842 |
| California AGresidents of CA | May 18, 2021 |
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 418842 · backfill source
- 2026-09-25 · disclosed: 2021-05-18 to 2020-12-21 · backfill source
- 2026-09-25 · summary: empty to The covered entity (CE), Health Plan of San Joaquin, reported that several employees were the victims of an email phishing scheme that affected the electronic protected health information (ePHI) of 418,842 individuals. The ePHI involved inc · 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.