Intelligent autonomous agents is an emerging technology that excels the applications, having complex distributed nature and requiring communication of complex and diverse forms of information, when deployed in multi-agent system setting. As healthcare is a complex domain and distributed in nature, scientist have started to deploy intelligent agents and multi-agent technologies indifferent healthcare information and decision support systems. We argue that efficacy of multiagent system and performance of multi-agent system architecture in any domain, in particular healthcare domain heavily depends on a single agent architecture and model that mimic human behavior. In this paper we present, Hybrid Intelligent Autonomous Agent (IAA) Model, Hybrid Intelligent Autonomous Agent (IAA) Architecture, and based on