In the physician billing system, a physician examines a patient and inserts records into system about patient examination. This examination is verified and a valid fee is computed for patient. As the patient is availing the insurance, so he submits an insurance form which holds all the detail about his insurance policy. It also describes that what amount will be paid by insurance company and what will be paid by the patient. On the basis of valid fee and insurance form submitted, an invoice is generated which is given to patient. Patient submits the fee which is verified. The invoice which is prepared is also sent to insurance company for payment. Payment made by insurance company is also verified.

Draw context level DFD of Physician Billing System.                                     Draw ER diagram also