Mapping from icd10cm and pcs codes back to icd9cm codes is referred to. 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. 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 as backward mapping. This tool is based on the general equivalency mapping gem files published by cms. General equivalence mappings are a tool that can assist with converting data from icd9cm to icd10cm and icd10pcs. The lack of an official mapping between icd9cm and icd10cmpcs has long been seen as a major challenge to icd10 implementation. Many professionals believe that general equivalence mapping tools, or gems, offer an easy crosswalk between icd9 and icd10. For a period of two years or more, systems will need to access both icd9cm codes and icd10cm codes as the country transitions from icd9cm to icd10cm. Downloads 2015 general equivalence mappings gems diagnosis codes and guide zip. These gem entries compare all possible onetoone maps of an icd9cm to an. Use aapc icd10 codes online conversion tool to convert icd9 to icd10 codes for medical diagnosis coding.
Mapping, aka general equivalence mappings or gems, is a tool for converting icd9cm to icd10cm and icd10pcs and vice versa. In healthcare, diagnosis and procedure codes and their attached descriptions are the currency for many critical data transactions. A warning about relying on gems as your icd10 solution. International classification of diseases,icd10cmpcs transition. Please visit for more information about icd10cmpcs.
Cms icd9cm to and from icd10cm and icd10pcs crosswalk or. Gems are a comprehensive translation dictionary that can be used to accurately and effectively translate any icd9cmbased data, including data for tracking quality. Mapping will be necessary so that equivalent codes can be found for issues of disease tracking, medical necessity edits and outcomes studies. The gems are a comprehensive translation dictionary that can be. Mapping from icd9cm codes to icd10cm and pcs codes is referred to as forward mapping. The essential guide to general equivalence mappings gems. This article will describe what the icd9cmicd10cm codes are, why they are so. The gems are forward and backward mappings between the icd9cm and. Gems are a comprehensive translation dictionary that can be used to accurately and effectively translate any icd9cmbased data. The gems are a tool that can be used to convert data from icd9cm to icd10cm and pcs and vice versa.1304 107 1532 594 1065 1126 341 895 215 1511 244 1589 471 1192 1009 637 83 571 362 1198 878 792 412 1466 925 285 38 1342 1313 1216 385 1095 1405 370 361 425 38 360 316 1208 396 26 980