Background: An opportune, efficient and low cost medical attention should be provided to all patients, without discrimination. When the need for medical attention outweighs the available resources, permanently increasing waiting lists are generated. The aim of the Universal Access and Explicit Guaranties Plan (AUGE) is to attend selected patients in periods predefined by the health authority. Aim: To describe the first six months of implementation of AUGE plan for chronic renal failure in a public hospital of Santiago. Material and methods: As a health care quality monitoring system, the lapse between the generation of a nephrological consultation and the specialist assessment, is registered periodically. These lapses were evaluated before and after the AUGE plan implementation, for eligible and non eligible patients for the plan. Results were modeled according queue theory. Results: After three months of implementation, the AUGE plan prolongs waiting periods and increases the number of all patients seeking for nephrological attention. Conclusions: According to these results AUGE plan will be successful only if its present functioning is modified and receives more financial resources (Rev Méd Chile 2003; 131: 545-51).