Modeling and simulation are becoming increasingly important tools for teaching and researching in medicine.Medical guidelines are systematically developed statements to assist practitioners to determine appropriate health care in specific circumstances.A medical guideline or protocol can be represented, in an abstract way, as a discrete event system model.This is indeed a promising field for applying this kind of models.In this paper, we present a finite automaton model for the Neonatal Adaptation Guideline developed by the School of Pediatrics and Neonatology of the National University of Colombia.The reported model extends the original flow chart containing the guideline, in terms of understanding, consistence and level of detail.