The MediKids Act would expand Medicaid coverage to all children and young adults under age 26, regardless of income, starting two years after the bill's enactment. States would be required to automatically enroll all children born within their borders at birth and extend continuous coverage through age 26, with parents or guardians able to opt out only if the child has alternative health insurance that meets federal standards. The federal government would cover 100 percent of the costs for individuals newly eligible under this expansion who were not previously covered by Medicaid as of January 1, 2025. The bill also removes immigration status restrictions, allowing undocumented children and young adults to access Medicaid benefits, and exempts this group from work requirements and certain community engagement obligations. This legislation was introduced by Senators Kim, Duckworth, Padilla, and Booker in July 2026.