According to Centers for Diseases Control and Prevention (CDC), the definition of chronic diseases is that the health conditions last 1 year or longer and require ongoing medical attention or limit activities of daily living or both. The common chronic diseases include cardiovascular disease, cancers, diabetes, and chronic respiratory diseases. The influence of chronic disease significantly impacts personal well-being, and it is also leading nationally economic cost on certain level. In recent years, the extent of influence from chronic disease has been more and more apparent compared with other communicable diseases. Based on the global status report from World Health Organization in 2014, there were 38 million people died of noncommunicable diseases which is 68% of world population. In particular, among the 38 million people, the proportion of premature death (younger than 70 years old) was over 40%. Gradually, the importance of noncommunicable diseases was formally recognized over years and concluded four major risk factors: tobacco use, excessive alcohol consumption, poor nutrition, lack of physical activity.

People in Taiwan rely overwhelmed heavily on medical services due to cultural influences and experiences. On top of that, low healthcare costs, 99.9% coverage offered by National Health Insurance and gradually aging society have all contributed to the phenomena of hospital shopping and polypharmacy.