Jefferson Healthcare
Disclosed Jan 11, 20215 years ago2,543 affectedConfirmed
The covered entity (CE), Jefferson Healthcare, reported that an employee was the victim of an email phishing attack that affected the electronic protected health information (ePHI) of approximately 2,543 individuals. The ePHI involved included names, addresses, dates of birth, drivers’ license numbers, Social Security numbers, financial information, claims information, diagnoses, lab results, medications prescribed, and other treatment information. The CE notified HHS, affected individuals, the media, and provided substitute notice on its website. In response to the breach, the CE implemented additional technical safeguards and retrained its staff on the importance of recognizing and responding to fraudulent email communications and other cybersecurity threats.
What is known
| People affected | 2,543 (as reported to HHS) |
|---|---|
| Disclosed | Jan 11, 2021 |
| Discovered | Nov 12, 2020 |
| Happened | Nov 9, 2020 |
| Attack | Phishing |
| Data exposed | Names, Health |
| Sector | Healthcare · US |
| Status | Confirmed |
Sources
| Source | |
|---|---|
| Washington Attorney General breach notice: Jefferson Healthcareatg.wa.gov · Official notice | Official notice |
| HHS OCR breach report (archive, resolved): Jefferson Healthcare (Healthcare Provider, WA)ocrportal.hhs.gov · Official notice | Official notice |
Notices filed
| Where | Filed | People |
|---|---|---|
| Washington AGresidents of WA | Jan 11, 2021 | 2,496 |
| HHS archivetotal | Jan 11, 2021 | 2,543 |
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 2543 · backfill source
- 2026-09-25 · summary: empty to The covered entity (CE), Jefferson Healthcare, reported that an employee was the victim of an email phishing attack that affected the electronic protected health information (ePHI) of approximately 2,543 individuals. The ePHI involved inclu · backfill source
- 2026-09-25 · added · backfill source
First seen 2026-09-25 (Washington AG), confirmed by Washington AG. Record counts are as reported. Not legal advice.