DentaQuest Data Breach Investigation
Stueve Siegel Hanson is representing individuals affected by a DentaQuest data breach that exposed sensitive personal and health information.
If you received a notification that your personal information may have been compromised in this breach, please fill out a contact form below.
DENTAQUEST DATA BREACH
DentaQuest is a national dental benefits administrator that provides coverage through plans serving approximately 33 million people.
On May 20, 2026, DentaQuest discovered that unauthorized individuals had accessed data on its computer network. According to DentaQuest, the unauthorized access began on May 17, 2026, and ended by May 20, 2026. Following an investigation, DentaQuest determined that affected individuals' personal information had been accessed and posted on the internet.
The information involved varied by individual but may have included:
- Names and addresses
- Social Security numbers
- Member identification numbers
- Medicaid or Medicare numbers
- Dental or vision health information, including provider names, diagnoses, treatments, and billing information
The incident affected both adults and children. DentaQuest filed separate notification letters for adults, minors, and deceased individuals with the California Attorney General.
The exposure of Social Security numbers, health-plan information, and dental or vision health information may increase the risk of identity theft, medical identity theft, fraud, and other misuse of personal information.
STUEVE SIEGEL HANSON APPOINTED INTERIM CO-LEAD COUNSEL
Multiple proposed class actions arising from the data breach have been consolidated in the U.S. District Court for the District of Massachusetts as In re: DentaQuest Group, Inc. Data Incident Litigation, Civil Action No. 26-CV-12458-AK.
On October 7, 2026, U.S. District Judge Angel Kelley appointed Stueve Siegel Hanson founding partner Norman E. Siegel, together with Gary M. Klinger of Milberg PLLC and Gerald D. Wells III of Lynch Carpenter LLP, to serve as Interim Co-Lead Class Counsel.
WHAT YOU CAN DO
If you received a notification that your personal information may have been compromised in this breach, please contact our team by filling out the contact form below.
ABOUT STUEVE SIEGEL HANSON
Stueve Siegel Hanson attorneys have represented data breach victims in many of the nation’s largest data breach class actions, including cases against Equifax, T-Mobile, Capital One and many others – securing much-needed relief for millions of affected consumers.
The firm’s Data Breach and Privacy class action practice has received local and national recognition, including being named a Cybersecurity & Privacy Practice Groups of the Year by Law360, which recognizes practice groups that “worked on the biggest deals or achieved the biggest wins in the most important cases.”
