An inpatient coder works in the medical field and is responsible for medical coding. As an inpatient coder, you are a certified professional and have undergone extensive training, both in class and on-the-job, to understand how to interpret and apply medical codes to patient files based on health and treatment documents received from doctors and nurses. A variety of medical personnel use codes for purposes that include diagnosis, treatment, insurance, and billing. You work with coding software to process claims and should have a broad understanding of terms used in the medical field related to anatomy, biology, and pharmacology. One of your primary responsibilities is keeping accurate medical records.