DentaQuest Data Breach Affects Over 23 Million Individuals

DentaQuest, a major dental benefits administrator, suffered a data breach affecting over 23 million individuals. The breach, which occurred between May 17 and May 20, 2026, involved hackers accessing sensitive personal and health information. The cyber threat group ShinyHunters is reportedly responsible for the attack. Affected data includes Social Security numbers, Medicaid and Medicare IDs, and detailed health information. DentaQuest began notifying affected individuals on July 17, 2026, with more than 15 million notifications sent as of August 2026. The breach is considered one of the largest healthcare breaches of the year. DentaQuest is working with Kroll for data analysis and has implemented additional security measures. The company has not disclosed the full scope of the breach but has confirmed the significant impact on its beneficiaries.

Key Points: • DentaQuest breach affects over 23 million individuals, making it one of 2026's largest healthcare breaches. • Sensitive data exposed includes Social Security numbers, health information, and Medicaid IDs. • The hacker group ShinyHunters is linked to the breach, which occurred from May 17 to May 20, 2026.