ICD-10 code sets are not a simple update of ICD-9 code set. ICD-10 character sets are fundamental changes in the structure and concepts that make them very different from the ICD-9. Because of these differences, it is important to develop a preliminary understanding of the changes from ICD-9 to ICD-10. This general idea of the differences will determine the more training that will be necessary for the proper use of ICD-10 code sets. Also, seeing the differences between code sets will raise ...