A billing representative handles all matters related to billing, payments, and medical insurance filing for a doctor's office, hospital, or other medical facility. As a billing representative, your duties include interacting directly with customers, submitting health insurance claims, preparing and mailing patient bills, and collecting and applying payments received. The career typically requires at least a high school diploma or GED certificate and on-the-job training. You may also pursue an associate degree or certificate program in medical assisting to improve your job prospects. Additional qualifications include strong customer service, organizational, and computer skills, as well as experience with medical coding and terminology.