Software Tools - Medical billing and coding software help healthcare professionals to easily enter and translate medical procedures and diagnoses into code sets based on the coding guidelines and compliance guidelines. The two main coding systems used in medical billing are Current Procedural Terminology (CPT) codes and International Classification of Diseases (ICD) codes. Top-down coding starts with a general diagnosis code and then focuses it with more precise codes. Systematized Nomenclature of Medicine Clinical Terms (SNOMED CT). Paying doctors, dentists, and veterinarians for their services is an essential aspect of healthcare. Decision Support Systems - This involves using computer-based programs that recommend codes based on the medical record.