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AI agents are transforming healthcare by advancing clinical decision support, automatingworkflows, and personalizing patient care. This review categorizes AI agents into four progressivemodels Foundation, Assistant, Partner, and Pioneer each representing increasing autonomy andclinical integration. Central to our contribution is a comprehensive implementation roadmapthat leverages a modular architecture, including perception, reasoning, interaction, and memorycomponents, to enable the seamless integration of these diverse AI agents. By providing actionableguidelines and illustrative architectural examples for deploying each agent type, this paperaddresses critical challenges such as data privacy, interoperability, and regulatory compliance,empowering healthcare organizations to effectively incorporate AI-driven solutions that enhancepatient outcomes and operational efficiency. The roadmap offers a step-by-step blueprint forselecting suitable agent models, integrating with existing systems, and establishing continuousfeedback loops. This contribution serves as a strategic guide for clinicians and IT professionalsto confidently adopt scalable, safe, and compliant AI innovations in complex clinical settings.