Use of multi-agent systems (MAS) in health-care domains is increasing. MAS is an appropriate technique for many medical domains due to the characteristics of the problems in this area. According to the World Health Organization (WHO) health care systems worldwide are faced with the challenge of responding to the needs of people with chronic conditions such as diabetes, heart failure and mental illness. Chronic disease management (CDM) is a systematic approach to improve health care for people with chronic disease. Electronic Institutions (EI), as agent technology, is considered a suitable paradigm for complex environments providing structured frameworks for multi-agent systems to regulate agents' interactions. In this paper we introduce the HCDMP System which is an electronic institution to improve the Hospitals Chronic Disease Management and Purchasing processes. HCDMP system provides a number of recommended services to the patients and aims to advance the self care as a well proven and highly effective means of improving the care of chronic diseases.