Quantum Health, Inc. Data Breach Notice (Washington Attorney General)

The filing from Quantum Health, Inc. means that the personal information of 15,321 people, including names, Social Security numbers, health insurance policy or ID numbers, and medical information, was exposed in an incident that occurred on May 29, 2026. The company did not notify Washington authorities until October 27, 2026 — an interval of 151 days, or about five months.

Your Social Security Number and Health Insurance Details Cannot Be Replaced

If you received a notification letter from Quantum Health, your name together with a Social Security number, health insurance ID, and medical records are now outside the organisation’s control. These four categories together create a high risk of identity theft and medical fraud. A thief who has your SSN and policy number can file false tax returns, open accounts, or submit bogus medical claims that may appear on your insurance history for years.

No passwords were exposed in this incident. That is genuine good news: there is no immediate need to change any Quantum Health login credentials because none were compromised.

What the 151-Day Gap Changes for You

The breach happened on May 29, 2026. The filing reached the Washington Attorney General on October 27, 2026. That five-month delay is the single most concrete fact in the record. During that period the data was outside the company’s systems and available to whoever accessed it. The filing does not state whether the information was copied or simply viewed, nor does it identify the cause.

How to Determine If You Are One of the 15,321 Affected Patients

Quantum Health is required to notify affected individuals directly, usually by mail. If you have not received a letter, it is likely your records were not included. However, if you have moved since May 29, 2026, or changed addresses after that date, contact Quantum Health directly to confirm whether your information was part of this filing. Absence of a letter is the best practical indicator, but only the company can give you a definitive answer.

Medical Information Plus an SSN Creates Long-Term Risk

Unlike a credit card, a Social Security number cannot be reissued on request. Combined with your health insurance policy number and medical details, it gives fraudsters the exact ingredients needed to impersonate you for insurance benefits, prescription drugs, or tax refunds. The exposure is permanent. What you can still control is how quickly you detect and respond to misuse.

Concrete Actions That Protect You Now

• Place a fraud alert with the three major credit bureaus immediately. This forces lenders to verify your identity before opening new accounts using your SSN.
• Review every Explanation of Benefits statement from your health insurer. Look for claims you did not receive care for; fraudulent medical billing is a common consequence when policy numbers and medical records are exposed.
• Monitor your tax account with the IRS. File your taxes early in the season and respond immediately to any unexpected notices about returns filed in your name.
• Enroll in free credit monitoring offered in the notification letter from Quantum Health. Use the services provided rather than signing up for new ones unless the letter’s offer has expired.
• Contact Quantum Health directly if you moved after May 29, 2026. Ask them to confirm whether your specific records were in the group of 15,321 affected patients.