Abstract: The Brahmaso Humanitarian Aid Organization (BHAO) is the most popular philanthropic organization in Myanmar. It provides various kinds of aids for human including healthcare service with free of charge. It stands only on donation from public. Total of sixteen units for health problems are provided. The purpose of this paper is to perform a comparative study for reduction of total patients’ waiting time in the clinic by considering for different departments of clinic such as patient’s registration and pre-checkup department, consultation department, and treatment and pharmacy department under the general diseases unit using different queuing models.