The real challenge for managers has been satisfying the following dilemma: provide health care with a quality minimally satisfactory, provide access to this system with the least possible restriction and with an affordable cost. In this context, the aim of this paper is to propose a discrete event simulation model that represents a subsystem of a hospital and demonstrate how it can be used to reconfigure the portfolio of services offered by the Medical Unit. Aiming thereby facilitate user access, organize flows and improve quality which translates into a reduction in the size of the queues and decrease the waiting time for care.