The Extended Patient Registration System is a web application designed to assist clinics in gathering additional patient information, seamlessly integrating it with their existing dental systems. This system is built on a robust technology stack, utilizing Go for backend development, React.js for the frontend, and PostgreSQL for the database. This combination ensures a scalable and efficient architecture. The application also incorporates key features such as REST API for efficient data exchange, WebSocket for real-time communication, and WebHook for event-driven interactions. These features enhance the system's data handling capabilities and facilitate smooth integration with other systems, providing clinics with a comprehensive tool to improve their operations and marketing strategies.