As countries throughout the world move towards universal health coverage, the obligation to realise the right to health for undocumented migrants has often been overlooked. With unprecedented millions on the move – including refugees, asylum seekers, internally displaced persons, and returnees – undocumented migrants represent a uniquely vulnerable subgroup, experiencing particular barriers to health related to their background as well as insecure living and working conditions. Their legal status under national law often restricts access to, and affordability of, healthcare services. While striving to ensure health for all, national governments face challenging priority setting dilemmas in deciding: who to include, which services to provide, and how to cover out-of-pocket expenses. Building on comparative experiences in Norway, Thailand and the United States – which reflect varied approaches to achieving universal health coverage – we assess whether these national approaches provide rights-based access to affordable essential healthcare services for undocumented migrants. To meet the shared Sustainable Development Goal on universal health coverage, the right to health must be realised for all persons – including undocumented migrants. To ensure universal health coverage in accordance with the right to health, governments must evaluate laws, regulations, policies and practices to evaluate: whether undocumented migrants are included, to which services they have access, and if these services are affordable. Achieving universal health coverage for everyone will require rights-based support for undocumented migrants
