According to the health sector, the medical record coder is a job that needs constant study and practice, and it is necessary to master the classification and coding rules of diseases and operations, as well as relevant knowledge of clinical medicine and statistics. It usually takes 3~5 years to become a qualified medical record coder, but it also depends on the individual's foundation, ability and hard work. If you want to take the International Classification and Coding Examination (ICD-1), you need to have some basic knowledge of medicine and disease diagnosis, and be familiar with the rules of disease coding. You can attend some training courses provided by regular training institutions or websites, and you can also prepare for the exam by reading some professional books and materials.