Mapping, aka General Equivalence Mappings or GEMs, is a tool for converting ICD-9-CM to ICD-10-CM and ICD-10-PCS and vice versa. GEMs are a comprehensive translation dictionary that can be used to accurately and effectively translate any ICD-9-CM-based data, including data for tracking quality; recording morbidity/mortality; calculating reimbursement; or converting any ICD-9-CM-based application to ICD-10-CM/PCS.
GEMs are complete in their description of all the mapping possibilities as well as when there are new concepts in ICD-10 that are not found in ICD-9-CM. All ICD-9-CM codes and all ICD-10-CM/ ICD-10-PCS codes are included in the collective GEMs products.
Mapping is done in two directions; forward and backward.
Forward mapping refers to mapping from ICD-9 codes to ICD-10 codes.
Backward mapping refers to mapping ICD-10 codes to ICD-9 codes.
WHO CAN USE THE GENERAL EQUIVALENCE MAPPINGS?
GEMs can be used by anyone who wants to convert coded data including: all payers; all providers; medical researchers; informatics professionals; coding professionals—to convert large data sets; software vendors; organizations needing to create mappings that suit their internal purposes; and others who use coded data.