<p>Undocumented immigrants experience profound disparities in access to life-sustaining kidney dialysis care due to exclusion from federal insurance programs. In most states, these individuals receive dialysis only under emergency conditions, a practice associated with higher mortality, increased hospitalizations, and significant psychosocial burden compared to scheduled outpatient dialysis. Immigration policy volatility further complicates care delivery and introduces unique challenges for clinical research involving this population. We examine the intersection of immigration policy, dialysis access, and research ethics in the current political climate in the United States, highlighting how systemic barriers and fear of deportation contribute to underrepresentation of undocumented patients in clinical trials. We review current policy frameworks, summarize evidence on health outcomes under emergency-only dialysis, and propose strategies to maintain scientific rigor and equity in research during periods of policy instability.</p>