What does a insurance billing code represent?

A medical billing code, also known as a healthcare common procedure coding system (HCPCS) code, Current Procedural Terminology (CPT®) code, or International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code, is a medical code used to represent medical procedures, services, and diagnoses for the purpose of insurance claims and medical billing. Each code represents a specific procedure, service, or diagnosis, and is used by healthcare providers to communicate this information to insurance companies and other payers.