Note: approximate conversions between ICD-9-CM codes and ICD-10-CM/PCS codes may require clinical interpretation in order to determine the most appropriate conversion code(s) for your specific coding 

Note: All diagnosis must be present in patient’s chart. Selection of approved diagnosis not supported by documentation is illegal and must be avoided.

Other available sources for more detailed information: 
ICD-10 Code Translator (Compare ICD-9 with ICD-10-CM codes using our code translator tool. The ICD-9-CM code set will increase from 17,000 to over 140,000 ICD-10 codes. map the expansion of codes by using this tool. (Note: The online translator tool only converts to ICD-10-CM codes. It does not convert to ICD-10-PCS.) is a free reference website that contains all of the official American ICD-10-CM (diagnosis) and ICD-10-PCS (procedure) medical billing codes. Use this site to search for any code, and to discover how the structure of the new coding set works. 

This information is a sample of what has changed for the coding of diagnosis (Click Here for Printable information)