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Quantum Health, Inc.: data breach filings, state by state

Quantum Health, Inc. has 9 data breach filings on record in 7 government portals. The latest was reported to Vermont AG on Oct 28, 2026, with 2,360 Vermont residents. Data exposed, as filed: Social Security number, Medical / health information, Health insurance, Date of birth, Email address, Phone number, Postal address.

315,292residents counted in 4 states (VT, TX, WA, MA). Latest filing per state, last twelve months
1,911,559people in total, as reported to Texas AG on Oct 28, 2026
9filings in 7 government portals
Oct 28, 2026latest filing, Vermont AG

By portal

PortalFilingsLatest reportPeople in the latest filing
Vermont AG1Oct 28, 20262,360 Vermont residents
Texas AG1Oct 28, 2026273,111 Texas residents
California AG2Oct 27, 2026Not published
Oregon DOJ1Aug 14, 2026184,376 in total
Washington AG1Aug 14, 20265,909 Washington residents
Massachusetts OCABR2Jul 30, 202633,912 Massachusetts residents
HHS OCR1Jul 29, 20262,104 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
May 26, 2026 to Jun 1, 2026
Discovered
Jun 1, 2026, as stated in the California letter
Offered to those affected
credit or identity monitoring through Experian (term not stated in the letter we read)
Third party named
Yes, the letter attributes the incident to a vendor or service provider
Days to notice
Past the statutory period in all 5 states that set one, counted from discovery to each state's first record
Prior incidents
1 earlier incident 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.

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Every filing

OrganizationSourceStateReportedResidents affectedData exposed
Quantum Health, Inc. Vermont AG VT Oct 28, 2026 2,360 Social Security numberMedical / health information
Quantum Health, Inc. Texas AG TX Oct 28, 2026 273,111 Social Security numberMedical / health informationHealth insuranceName
Quantum Health, Inc. California AG CA Oct 27, 2026 Not published Social Security numberMedical / health informationHealth insuranceDate of birth+4
Quantum Health, Inc. Oregon DOJ OR Aug 14, 2026 184,376 Not stated
Quantum Health, Inc. California AG CA Aug 14, 2026 Not published Social Security numberMedical / health informationHealth insuranceDate of birth+4
Quantum Health, Inc. Washington AG WA Aug 14, 2026 5,909 Social Security numberMedical / health informationHealth insuranceDate of birth+1
Quantum Health, Inc. Massachusetts OCABR MA Jul 30, 2026 33,912 Social Security numberMedical / health information
Quantum Health HHS OCR US Jul 29, 2026 2,104 Medical / health information
Quantum Health, Inc. Massachusetts OCABR MA Feb 18, 2026 653 Social Security number

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.