Westat
Disclosed Jul 21, 20233 years ago51,513 affectedConfirmed
The covered entity (CE), Westat, reported that a software application used by its business associate (BA) exposed the protected health information (PHI) of 20,045 individuals. The PHI involved included names, addresses, dates of birth, claims information, diagnoses/conditions, and treatment information. The BA notified HHS, the affected individuals, and provided substitute notice. In response to the breach, the BA provided complimentary credit monitoring services and implemented additional administrative, technical, and security safeguards to better protect PHI.
What is known
| People affected | 51,513 (as reported to HHS) |
|---|---|
| Disclosed | Jul 21, 2023 |
| Happened | May 28, 2023 |
| Attack | Hacking |
| Data exposed | Names, Health |
| Sector | Healthcare · US |
| Status | Confirmed |
Sources
| Source | |
|---|---|
| Vermont Attorney General: 2023-07-21 Westat Data Breach Notice to Consumersago.vermont.gov · Official notice | Official notice |
| Indiana Attorney General 2023 data breach report: Westatin.gov · Official notice | Official notice |
| HHS OCR breach report (archive, resolved): Westat (Business Associate, MD)ocrportal.hhs.gov · Official notice | Official notice |
Notices filed
| Where | Filed | People |
|---|---|---|
| Vermont AGresidents of VT | Jul 21, 2023 | |
| Indiana AGresidents of IN | Jul 21, 2023 | 91 |
| Indiana AGresidents of IN | Oct 13, 2023 | 32 |
| HHS archivetotal | Oct 13, 2023 | 51,513 |
| HHS archivetotal | Nov 3, 2023 | 20,045 |
History of this record
- 2026-09-25 · records: 20045 to 51513 · backfill source
- 2026-09-25 · sector: other to health · backfill source
- 2026-09-25 · attack: unknown to hacking · backfill source
- 2026-09-25 · data_types: [] to ["names","health"] · backfill source
- 2026-09-25 · records_basis: organization to hhs · backfill source
- 2026-09-25 · records: 7954 to 20045 · backfill source
- 2026-09-25 · summary: empty to The covered entity (CE), Westat, reported that a software application used by its business associate (BA) exposed the protected health information (PHI) of 20,045 individuals. The PHI involved included names, addresses, dates of birth, clai · backfill source
- 2026-09-25 · records_basis: empty to organization · backfill source
- 2026-09-25 · records: empty to 7954 · backfill source
- 2026-09-25 · occurred: empty to 2023-05-28 · backfill source
- 2026-09-25 · added · backfill source
First seen 2026-09-25 (Vermont AG), confirmed by Vermont AG. Record counts are as reported. Not legal advice.