A Billing Specialist oversees the tasks of sending new invoices to clients and ensuring all outstanding invoices are paid in full and on time. They are client-focused and assist them with any issues with invoices. A billing assistant gathers, calculates, and documents numerical data for invoicing purposes. The scope and method of executing those duties vary by employer. For example, your tasks might be restricted to billing. A billing specialist, or billing clerk, manages the billing processes for an employer's business, often in an insurance or medical office. As a billing specialist, your duties include producing medical billing for customers, generating invoices, and receiving payments. The duties and responsibilities of a Billing Specialist include sending invoices and account updates to clients, receiving, sorting, and tracking incoming payments, addressing and resolving client questions and issues relating to invoices, and providing regular, accurate reports of billing data.