type: incident · created: 2026-07-24 · updated: 2026-07-24 · tags: [incident, data-breach, healthcare, dental, mass-notification] · confidence: medium · affected_sectors: [healthcare] · au_impact: false
DentaQuest Healthcare Breach — 15+ Million Notified
Dental benefits administrator DentaQuest began issuing notification letters to over 15 million individuals affected by a cybersecurity incident discovered in May 2026. This is one of the largest healthcare data breach notifications in recent years.
Overview
| Attribute | Detail |
|---|---|
| Target | DentaQuest — US dental benefits administrator |
| Sector | Healthcare — dental insurance/benefits |
| Impact | 15+ million individuals notified |
| Discovered | May 2026 |
| Notification | July 23, 2026 |
| Status | Investigation ongoing; full scope still being assessed |
Significance
- Among the largest healthcare data breaches on record by number of affected individuals
- Dental benefits data typically includes personally identifiable information (PII), insurance details, and protected health information (PHI)
- The scale underscores the concentration risk when a single dental benefits administrator processes data for millions
Related Pages
- Medical Device Breach — Medical device manufacturer breach affecting ~4M (related healthcare sector breach)
- Craneware Cyberattack — Healthcare software vendor cyberattack (same sector, different impact type)