Joslin Diabetes Center
Disclosed Sep 14, 20206 years ago71,160 affectedConfirmed
The covered entity (CE), Joslin Diabetes Center, reported that its business associate experienced a ransomware attack affecting the electronic protected health information (ePHI) of approximately 71,160 individuals. The ePHI involved included names, addresses, email addresses, gender, dates of birth, and treatment information. The CE notified HHS, affected individuals, the media, and provided substitute notice.
What is known
| People affected | 71,160 (as reported to HHS) |
|---|---|
| Disclosed | Sep 14, 2020 |
| Discovered | Aug 20, 2020 |
| Happened | May 14, 2020 |
| Attack | Ransomware |
| Data exposed | Names, Health |
| Sector | Healthcare · US |
| Status | Confirmed |
Sources
| Source | |
|---|---|
| California Attorney General breach notice: Joslin Diabetes Centeroag.ca.gov · Official notice | Official notice |
| Washington Attorney General breach notice: Joslin Diabetes Centeratg.wa.gov · Official notice | Official notice |
| HHS OCR breach report (archive, resolved): Joslin Diabetes Center (Healthcare Provider, MA)ocrportal.hhs.gov · Official notice | Official notice |
Notices filed
| Where | Filed | People |
|---|---|---|
| HHS archivetotal | Sep 14, 2020 | 71,160 |
| California AGresidents of CA | Sep 18, 2020 | |
| Washington AGresidents of WA | Sep 18, 2020 | 1,212 |
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 71160 · backfill source
- 2026-09-25 · disclosed: 2020-09-18 to 2020-09-14 · backfill source
- 2026-09-25 · summary: empty to The covered entity (CE), Joslin Diabetes Center, reported that its business associate experienced a ransomware attack affecting the electronic protected health information (ePHI) of approximately 71,160 individuals. The ePHI involved includ · 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 2020-08-20 · 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.