✅ Official notice on file. Quantum Health, Inc. filed this data breach notice with the California Attorney General on Aug 14, 2026. Compare it with the letter you received: the official copy is linked below.
Quantum Health, Inc. reported a data breach caused by unauthorized access to its computer network. The information involved includes Social Security number, date of birth, medical information, health insurance, phone number, home address.
Key facts
| Unauthorized access | May 29, 2026 – Jun 1, 2026 |
|---|---|
| Discovered | Jun 1, 2026 |
| Incident type | Network intrusion |
| Data exposed | Social Security number, Date of birth, Medical information, Health insurance, Phone number, Home address |
| Reported to California AG | Aug 14, 2026 |
| Company helpline | 1-844-958-8913 |
Free credit monitoring
Quantum Health, Inc. is offering 12 months of Kroll at no cost to people who received the letter.
What to do now
- Freeze your credit for free at Equifax, Experian and TransUnion, and request an IRS Identity Protection PIN at irs.gov to block fraudulent tax returns in your name.
- Your date of birth is often used to verify identity: add a fraud alert to your credit file so lenders must confirm it is really you.
- Review the Explanation of Benefits statements from your insurer for services you never received.
- Ask your insurer whether a new member ID can be issued, and check claims made under your policy.
- Be wary of calls or texts that mention this incident and ask for codes or payment.
- Get your free credit reports at AnnualCreditReport.com and look for accounts you do not recognize.
- Call the Quantum Health, Inc. helpline at 1-844-958-8913 if you have questions about your letter.
Timeline
- May 29, 2026 — Unauthorized access begins
- Jun 1, 2026 — Quantum Health, Inc. discovers the incident
- Aug 14, 2026 — Breach reported to the California Attorney General
Other recent data breaches
- BASS Medical Group data breach
- San Bernardino County on behalf of Arrowhead Regional Medical Center data breach
- Modoc Medical Center data breach
- Ridgeway Pharmacy Ltd data breach
- Paradigm Healthcare Services data breach
Source: notification letter and filing submitted by Quantum Health, Inc. to the California Attorney General. BreachLetter is not affiliated with Quantum Health, Inc.. Details extracted from the official letter; always follow the instructions in your own copy.