This Hospital ER Diagram depicts all of the visual instruments of database tables and the relationships between the entities Patient, Doctor, Laboratory, Inpatient, Outpatient, Room, Bill, and others. It used structured data to define the linkages between structured data groups in the capabilities of the Hospital Management System. The Hospital Management System comprises patients, doctors, laboratories, inpatients, outpatients, rooms, bills, and other entities. The Hospital Management System database design aims to create a secure and convenient way to store information about patients, doctors, inpatients, outpatients, rooms, and billing.