The Fundamentals of Medical Coding and Billing. By being precise, the coding should prevent generalization, which could result in coding errors. What are the 5 methods of coding. The International Classification of Diseases (ICD) code and Current Procedural Terminology (CPT) code are the two primary coding systems used in medical billing. What are the four coding steps?Patient registration, medical coding, billing, and medical claim are the four processes of coding.
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