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DentaQuest: data breach filings, state by state

DentaQuest has 7 data breach filings on record in 7 government portals. The latest was reported to Vermont AG on Sep 28, 2026, with 2 Vermont residents. Data exposed, as filed: Medical / health information, Social Security number, Health insurance, Date of birth, Postal address.

5,878,702residents counted in 3 states (VT, TX, MA). Latest filing per state, last twelve months
15,000,000people in total, as reported to Texas AG on Jul 17, 2026
7filings in 7 government portals
Sep 28, 2026latest filing, Vermont AG

By portal

PortalFilingsLatest reportPeople in the latest filing
Vermont AG1Sep 28, 20262 Vermont residents
Texas AG1Jul 17, 20263,973,000 Texas residents
Oregon DOJ1Jul 16, 202615,000,000 in total
California AG1Jul 16, 2026Not published
Massachusetts OCABR1Jul 16, 20261,905,700 Massachusetts residents
HHS OCR1Jul 16, 202615,000,000 in total
Iowa AG1Jul 16, 2026Not published

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
May 17, 2026 to May 19, 2026
Discovered
May 20, 2026, as stated in the California letter
Offered to those affected
24 months of credit or identity monitoring through Experian
Third party named
Yes, the letter attributes the incident to a vendor or service provider
Days to notice
Past the statutory period in 3 of the 4 states that set one, counted from discovery to each state's first record

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.

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Every filing

OrganizationSourceStateReportedResidents affectedData exposed
DentaQuest Vermont AG VT Sep 28, 2026 2 Medical / health information
DentaQuest, LLC Texas AG TX Jul 17, 2026 3,973,000 Social Security numberMedical / health informationHealth insuranceDate of birth+2
DentaQuest LLC Oregon DOJ OR Jul 16, 2026 15,000,000 Not stated
DentaQuest LLC California AG CA Jul 16, 2026 Not published In the letter (PDF)
DentaQuest LLC Massachusetts OCABR MA Jul 16, 2026 1,905,700 Social Security numberMedical / health information
DentaQuest, LLC HHS OCR US Jul 16, 2026 15,000,000 Medical / health information
DentaQuest LLC Iowa AG IA Jul 16, 2026 Not published Medical / health informationName

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.