Medical coding is an important procedure in health care that transforms the doctors, procedures, treatments, and services that are recorded by the professionals into common alpha numerical code. The codes are of international origin and are provided by the internationally accepted systems, which are ICD-10-CM (International Classification of Diseases), CPT (Current Procedural Terminology), and HCPCS (Healthcare Common Procedure Coding System); the sources of the codes. Coding provides a means of ensuring that all services that a patient gets is documented correctly and in a language that has been translated and understood by providers, insurers, as well as the regulators.. It is an important aspect in billing and insurance payment since the claims are submitted on the basis of the flawlessness of these codes. Effective coding will avoid claim rejections, minimize billing errors, maintain regulatory compliance, and facilitate effective revenue-cycle management of hospitals and clinics. In addition to billing, the code keeps a proper record of patients, assists in the analysis of healthcare data, and contributes to the reporting of the public and health, so it is one of the key pillars of the modern healthcare system.