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Confirmed breach

Quantum Health data breach

USUnited States · OH · Quantum Health, Inc.

Quantum Health (OH, United States) notified the Washington Attorney General and the Texas Attorney General of a data breach on 14 August 2026. It told the states about 5,909 Washington residents; the total can be higher. Exposed: Social Security numbers, Health insurance details, Health and medical information, Dates of birth and Names. The breach began on 26 May 2026, 80 days before it was reported.

If Quantum Health had your data

  1. Look for Quantum Health, Inc.’s own notice or letter: it should say what of yours was involved. Keep it.
  2. An ID number cannot be changed, so lock it: a credit freeze or fraud alert in the US, a credit warning (kreditadvarsel) on borger.dk in Denmark, Cifas protective registration in the UK.
  3. Check your health insurer’s statements for treatment you never had.
  4. Expect scams that use your details: calls, texts or emails pretending to be Quantum Health, Inc., your bank or the police. Never give codes or passwords, never approve a sign-in you did not start, never move money.

One email to confirm first. We use your address only for this alert, and one click deletes it.

More breaches in United States

  1. Johns Hopkins Bayview Medical CenterUSUnited States · MD · 27 October 2026 Health and medical informationFinancial account and card detailsAdmission dates+3 3.1Kpatients
  2. Monmouth UniversityUSUnited States · NJ · 26 October 2026 Social Security numbersGovernment ID numbersHealth and medical information+2 346Vermont residents
  3. Frontline EducationUSUnited States · 26 October 2026 Social Security numbers 3KVermont residents
  4. USForexUSUnited States · 26 October 2026 –not reported
  5. Alpha Omega Alpha Honor Medical SocietyUSUnited States · 26 October 2026 Financial account and card details 12Vermont residents

Every breach in United States →

From the data breach tracker: official notices, breach databases and the news, every fact with its source. Open data (CC BY 4.0) · How the tracker works · Found a mistake? Tell us and we correct it.