# Quantum Health, Inc.: data breach notice filed with the Washington Attorney General (2026-08-14)

**Score:** 35/100

| Field | Value |
|---|---|
| Organization | Quantum Health, Inc. |
| Attorney General notified | WA |
| Notice date | 2026-08-14 |
| Breach dates | 2026-05-26 to 2026-06-01 |
| Cause | Cyberattack |
| Attack type | Other |
| Industry | Health |
| State residents affected | 5,909 |
| Days from discovery to notice | 74 |
| Organization state | OH |

## Why this score
- Cyberattack.

Source: Washington State Attorney General data breach notifications (data.wa.gov) and California Attorney General data security breach list (oag.ca.gov) (https://data.wa.gov/d/sb4j-ca4h). Last refreshed: 2026-11-04T06:06:58.316Z.
From the Washington, California and Delaware Attorney General breach notification lists, as posted. A notice is the organization's own report under state breach-notification law; it is not a finding of wrongdoing or of harm. California does not publish cause or counts in its list; Delaware lists data types and counts but not cause. Read the notice on the AG site before relying on it.