Quantum Health, Inc.

Quantum Health, Inc. notified California AG on Oct 27, 2026 of a data breach, which occurred on Jun 1, 2026. Data exposed: Social Security number, Medical / health information, Health insurance, Date of birth, Email address, Phone number, Postal address, Name.

Organization: Quantum Health, Inc.
Source: California AG · source record
Date reported: Oct 27, 2026
Date(s) of breach: Friday, May 29, 2026Monday, June 1, 2026
Residents affected: Not published by this source
Data exposed: Social Security number Medical / health information Health insurance Date of birth Email address Phone number Postal address Name
Notice letter: Sample notice (PDF)
First seen by BreachTally: 2026-11-05 19:01 UTC

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

Other filings by Quantum Health, Inc.

Organization	Source	State	Reported	Residents affected	Data 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.	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.