A warning about relying on gems as your icd10 solution. These gem entries compare all possible onetoone maps of an icd9cm to an. In healthcare, diagnosis and procedure codes and their attached descriptions are the currency for many critical data transactions. Mapping from icd10cm and pcs codes back to icd9cm codes is referred to as backward mapping. Gems are a comprehensive translation dictionary that can be used to accurately and effectively translate any icd9cmbased data. The gems are a comprehensive translation dictionary that can be. These 2018 icd10cm codes are to be used for discharges occurring from october 1, 2017 through september 30, 2018 and for patient encounters occurring from october 1, 2017 through september 30, 2018.
Mapping from icd10cm and pcs codes back to icd9cm codes is referred to. Icd10 training icd9 to icd10 general equivalence mapping. Gems are a comprehensive translation dictionary that can be used to accurately and effectively translate any icd9cmbased data, including data for tracking quality. General equivalence mappings are a tool that can assist with converting data from icd9cm to icd10cm and icd10pcs. The gems are forward and backward mappings between the icd9cm and icd10 coding systems and are also referred to as crosswalks since they provide important information linking codes of one system with codes in the other system. The 2015 icd10cm files below contain information on the new diagnosis coding system, icd10cm, that is being developed as a replacement for icd9cm, volumes 1 and 2. The lack of an official mapping between icd9cm and icd10cmpcs has long been seen as a major challenge to icd10 implementation. International classification of diseases,icd10cmpcs transition. Please visit for more information about icd10cmpcs. The essential guide to general equivalence mappings gems. Mapping will be necessary so that equivalent codes can be found for issues of disease tracking, medical necessity edits and outcomes studies. Many professionals believe that general equivalence mapping tools, or gems, offer an easy crosswalk between icd9 and icd10.