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Latest / Washington / October 2026

Quantum Health, Inc.

Quantum Health, Inc. notified Washington AG on Oct 27, 2026 of a data breach affecting 15,321 Washington residents, which occurred on May 29, 2026. Data exposed: Social Security number, Medical / health information, Health insurance, Name.

All 10 filings by Quantum Health, Inc., state by state · Case file (dates, days to notice against the statute, what the letter offers, prior incidents)

Organization
Quantum Health, Inc.
Source
Washington AG · source record
Date reported
Oct 27, 2026
Date(s) of breach
05/29/2026
Residents affected
15,321 (Washington residents)
Data exposed
Social Security number Medical / health information Health insurance Name
Notice letter
Sample notice (PDF)
Days to notice
151 days from the end of the breach window (May 29, 2026, no discovery date in the letter) to the Washington record (Oct 27, 2026). Statute: 30 days from discovery of the breach (RCW 19.255.010).
Offered in the letter
credit or identity monitoring through Experian
First seen by BreachTally
2026-11-09 20:31 UTC

Dates and counts as filed by the organization with the agency. The breach window and the report date often differ by months.

First seen by BreachTally at 20:31 UTC on Nov 9, 2026. New filings reach paid subscribers within 30 minutes of the agency posting, with the count, the data exposed and the letter. Start a 14-day free trial. We email you two days before the first charge and you cancel in one click.
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Information compromised, as listed

Name; Social Security Number; Health Insurance Policy or ID Number; Medical Information

Other filings by Quantum Health, Inc.

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 a public government filing. Spot an error? Email support@breachtally.com with the record link. Corrections are applied and noted.