Designed with EdrawMax, this template is an interaction diagram for a hospital management system. The central "Hospital Management System" interacts with multiple entities. Patients can register details and request appointments. Doctors receive patient details, provide diagnoses, and send treatment updates. The Admin manages staff and generates reports. The Receptionist confirms appointments. The Pharmacy handles medication requests and checks availability. Billing Departments deal with payment processing and provide billing status. This diagram illustrates the flow of information and interactions within a hospital management system, helping to understand how different components work together to ensure smooth hospital operations, from patient registration to treatment and billing.