Landscape of Emergency Medicaid and Health Care Coverage for Undocumented Immigrants in the US

Importance Undocumented immigrants represent a disproportionate share of uninsured individuals in the US, owing to federal restrictions that limit access to affordable health care coverage. Emergency Medicaid (EM) and other state-sponsored programs offer mechanisms for receiving necessary medical care, but their scope and provisions are poorly understood by patients, clinicians, and policymakers alike. Objective To examine the national policy landscape of EM and other state programs designed to provide health care coverage for undocumented immigrants. Evidence Review Between January 2024 and June 2024, individual state policies on EM and programs providing health care coverage for undocumented immigrants were reviewed, including (1) Medicaid-equivalent programs, (2) State Plan Amendments (SPAs), and (3) Marketplace-based programs via Section 1332 waivers. Policy documentation for all 50 states and Washington, DC, was sourced from publicly available materials—including state Medicaid agency websites, policy manuals, and clinician handbooks. Findings were verified via multiple independent manual reviews. Findings Thirty-seven states (74%) and Washington, DC, offer EM coverage for the duration of the emergency only. Eighteen states provide (36%) 3 to 6 months of retroactive coverage, whereas 13 states (26%) offer 2 to 12 months of prospective coverage. Twenty states (40%) and Washington, DC, provide coverage of routine dialysis for patients with end-stage kidney disease, whereas only 5 states (10%) offer coverage for cancer treatment. Twelve states (24%) and Washington, DC, offer state-sponsored Medicaid-equivalent plans, with 4 states (8%) and Washington, DC, offering coverage to all age groups. Twenty-two states (44%) and Washington, DC, provide prenatal coverage via the From-Conception-to-End-of-Pregnancy SPA option; and 6 states (12%) offer postpartum coverage. In 2 states (4%), residents can purchase commercial Marketplace plans, regardless of immigration status. Conclusions and Relevance This nationwide analysis found significant variation in the health care coverage available to undocumented immigrants. Although some states have optimized flexibility in EM policy language to expand coverage for ongoing care of certain chronic conditions, substantial coverage gaps persist. Medicaid-equivalent plans and Marketplace-based strategies offer avenues for comprehensive coverage; however, these mechanisms are subject to state budgetary constraints and political challenges. Despite anticipated rollbacks of federal Medicaid funding, states must continue to identify sustainable and equitable coverage solutions for this essential part of the US population.