1. Official policies published by the Centers for Medicare and Medicaid Services (CMS) that tell how procedure codes are to be assigned by providers when submitting insurance claims for patients who have received medical services. 2. Official rules for assigning ICD-9-CM diagnostic codes to patients’ conditions of illnesses, injuries, and diseases.

Official code conventions used when selecting diagnostic and procedural code numbers for a patient who has received medical services by a provider.

Expert in coding diagnoses and procedures using diagnostic and procedural code books.

One type of certification earned by meeting the requirements of the American College of Medical Coding Specialists (ACMCS).