Quest Diagnostics: data breach filings, state by state
Quest Diagnostics has 4 data breach filings on record in 2 government portals. The latest was reported to California AG on Nov 16, 2021. Data exposed, as filed: Social Security number, Email address, Postal address.
By portal
| Portal | Filings | Latest report | People in the latest filing |
|---|---|---|---|
| California AG | 3 | Nov 16, 2021 | Not published |
| Oregon DOJ | 1 | Dec 12, 2016 | 34,055 in total |
Counts are the organization's own, as filed with each agency. Most state portals count their own residents only, so no single state shows the whole incident. An organization can file more than once for the same incident, and for different ones.
Case file
- Breach window
- Oct 29, 2021
- Discovered
- No discovery date stated in the letters we read
- Offered to those affected
- credit or identity monitoring through Experian (term not stated in the letter we read)
- Third party named
- No
- Prior incidents
- 2 earlier incidents on record for this organization
Open the case fileWord document
Every filing with the agency links, each state's record against its statutory period with the citation, what the letter offers, prior incidents. Letter facts are quoted so you can check them.
Every filing
| Organization | State | Reported | Residents affected |
|---|---|---|---|
| Quest Diagnostics | CA | Nov 16, 2021 | Not published |
| Quest Diagnostics | OR | Dec 12, 2016 | 34,055 |
| Quest Diagnostics | CA | Dec 12, 2016 | Not published |
| Quest Diagnostics | CA | Dec 19, 2014 | Not published |
Filings by other organizations that name Quest Diagnostics
When a vendor is breached, its clients often file under their own names and mention the vendor.
| Organization | State | Reported | Residents affected |
|---|---|---|---|
| ExamOne (a Quest Diagnostics Company) | MA | Oct 24, 2026 | 1 |
| ExamOne (a Quest Diagnostics Company) | MA | Aug 22, 2026 | 1 |
| ExamOne (a Quest Diagnostics Company) | MA | Aug 13, 2026 | 1 |
| ExamOne (a Quest Diagnostics Company) | MA | Aug 3, 2026 | 1 |
| ExamOne (a Quest Diagnostics Company) | MA | Jul 10, 2026 | 1 |
| ExamOne (a Quest Diagnostics Company) | MA | May 13, 2026 | 1 |
Data reproduced from public government filings. Each row opens the record with the agency link. Spot an error? Email support@breachtally.com with the page link. Corrections are applied and noted.