2026 Wisconsin DHS — SSI benefit letters mailed to outdated addresses; 8,157 members
Data compromised
Per Wisconsin DHS June 30, 2026 release: personal and private information regarding SSI benefit increases sent to incorrect/outdated mailing addresses for 8,157 Medicaid SSI members
Technical writeup
Verified unauthorized disclosure — disclosed June 30, 2026. The Wisconsin Department of Health Services (DHS) announced that some Medicaid members receiving Supplemental Security Income benefits had letters containing personal and private information about benefit increases mailed to outdated addresses. DHS discovered the issue April 30, 2026, halted further mailings to incorrect addresses, and on June 30, 2026 notified 8,157 affected members, offering one year of free credit monitoring and a dedicated call center at 800-362-3002. The U.S. HHS OCR breach portal lists Wisconsin Department of Health Services with 8,157 individuals affected, submitted July 1, 2026, as unauthorized access/disclosure involving paper/films.
Root cause
Wisconsin Department of Health Services mailed Supplemental Security Income benefit-increase letters containing personal information to outdated member addresses; discovered April 30, 2026