An entry-level medical coder works in the billing department of hospitals, doctor's offices, and other healthcare facilities. Entry-level medical coders transfer healthcare services and claims into universal medical codes for insurance reimbursement purposes. To become an entry-level medical coder, you must have excellent attention to detail and a solid base knowledge of medical terminology, procedure and visit authorizations, and insurance billing procedures. While not required, some employers prefer entry-level medical coders to have an associate degree in medical coding or the Certified Professional Coder (CPC) credential. When you first start in this entry-level position, your employer may have you shadow veteran medical coders to become proficient in the medical codes and be supervised when you first submit claims.