Illinois Department of Human Services

Illinois Department of Human Services (IDHS) is a state agency responsible for administering a range of human services programs in Illinois, including Medicaid, Supplemental Nutrition Assistance Program (SNAP), Temporary Assistance for Needy Families (TANF), and services for the Division of Rehabilitation Services. It provides eligibility determination, benefits distribution, case management, and support for individuals with disabilities, low-income families, and other vulnerable populations. The agency operates the Manage My Case portal, an online system through which beneficiaries can access their benefits, update personal information, and communicate with case workers. In addition to the portal, IDHS maintains various data and mapping systems that support program administration and were referenced in the 2025 security incident. The 2023 breach involved attackers creating unauthorized accounts in the state's benefits eligibility system using externally stolen personal data, which allowed them to access and link existing accounts and compromise names, Social Security numbers, addresses, phone numbers, income details, and recipient IDs. The 2025 breach stemmed from a publicly accessible mapping website that exposed addresses, case numbers, demographic data, and medical assistance plans for hundreds of thousands of Medicaid and Medicare Savings Program recipients, while also revealing names, addresses, case numbers, and referral sources for Division of Rehabilitation Services customers.

While specific employee or budget figures are not provided in the source material, the agency’s services reach hundreds of thousands of residents, as evidenced by the breach affecting approximately 700,000 individuals, including 32,000 rehabilitation services customers and roughly 672,000 Medicaid and Medicare Savings Program recipients. The agency’s headquarters is located in the United States of America. Distinguishing attributes: IDHS functions as a regulatory and administrative body overseeing public assistance programs, ensuring compliance with federal and state eligibility requirements, and coordinating with other state agencies. It holds a central role in the state’s social safety net, specializing in benefits administration and rehabilitation services. As a department of the Illinois state government, IDHS reports to the Governor of Illinois and is part of the executive branch; no parent or subsidiary relationships are indicated in the provided information.