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Illinois Secures Preliminary Injunction Against Trump Administration's Unfettered Access to Medicaid Data

Strategic Insights

— 2 min read

A U.S. District Court has granted a preliminary injunction, blocking the Department of Homeland Security (DHS) from accessing Medicaid data for immigration enforcement purposes. This decision was made in response to a lawsuit filed by Attorney General Kwame Raoul and a multistate coalition, arguing that the Trump administration's actions were arbitrary and capricious, violating the Administrative Procedure Act. The court's ruling will remain in place until the litigation concludes or the HHS and DHS complete a reasoned decision-making process. This development is seen as a critical tool to protect vulnerable residents, particularly Medicaid recipients who will be disproportionately impacted by the administration's actions.

Key Takeaways:

  • The U.S. District Court for the Northern District of California granted a preliminary injunction against the Trump administration's decision to provide the Department of Homeland Security (DHS) with unfettered access to individual personally-identifying information from Medicaid data.
  • The preliminary injunction blocks DHS from using the plaintiff states' Medicaid data for immigration enforcement purposes and also blocks HHS from sharing that Medicaid data with DHS for immigration enforcement purposes.
  • The court ruled that the Trump administration's actions were likely arbitrary and capricious and that the rulemaking violated the Administrative Procedure Act.
  • The lawsuit, filed by Attorney General Kwame Raoul and a multistate coalition, argues that the mass transfer of Medicaid data violates the law, creating fear and confusion among noncitizens and their family members.
  • The coalition asked the court to block any new transfer or use of this data for immigration enforcement purposes.
  • The preliminary injunction will remain in place until 14 days after HHS and DHS complete a reasoned decision-making process that complies with the Administrative Procedure Act, or until the litigation concludes.
  • Medicaid is an essential source of health insurance for low-income individuals and underserved population groups, with around 78.4 million people enrolled in Medicaid and the Children's Health Insurance Program (CHIP) as of January 2025.
  • In Illinois, Medicaid, CHIP, and other affordable health care programs provide critical health care coverage to nearly 3.5 million individuals and families across the state.

Statistics:

  • 78.4 million people were enrolled in Medicaid and the Children's Health Insurance Program nationwide as of January 2025.
  • Nearly 3.5 million individuals and families in Illinois rely on Medicaid, CHIP, and other affordable health care programs for health care coverage.
  • A total of 19 states joined Attorney General Raoul in the litigation, including Arizona, California, Colorado, Connecticut, Delaware, Hawaii, Massachusetts, Maine, Maryland, Michigan, Minnesota, Nevada, New Jersey, New Mexico, New York, Oregon, Rhode Island, Vermont, and Washington.

Sources:

  • [Office of the Illinois Attorney General]
  • [Source: U.S. District Court for the Northern District of California]

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