This article explores the institutional capacity to respond to the health needs of mexican mi- grants repatriated through tijuana, Baja california, mexico. twenty-one semi-structured in- terviews with governmental and civil society organizations were conducted. The information was analyzed using the concept of cooperation. r esults show an informal inter-institutional network based on common goals and interdependence of resources. Health service provision is not completely functional, due in part to lack of trust between some actors and to demand overload in the most important public provider of secondary and tertiary care services in tijuana.