In this simulation study, we simulate patient arrivals and their flow within a hospital with the objective of improving patient waiting times and effective usage of health care resourses such as nurses, physians and other healthcare personell. Our simulation model includes the following departments of the hospital. Registration, Triage, Emergengy department, X-ray, Labs, Clinics, and the Surgery department. We, first collect the arrival data, map out the processes in each department, and collect processing time data for each operation. We also determine the type and number of nurses, physians, their alternates needed to perform each operation. In our simulation study, we first simulate the current situation in the hospital and establish a baseline. As an improvement attempt, we develop several scenerios which focus on resourse sharing among several departments, changing staffing levels of departments during the day based on patient traffic and provide recomemndations to the hosptial management.