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ICD-10

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General Equivalence Mappings (GEMs)

The 2015 ICD-10-CM codes and mapping files are now posted on the 2015 ICD-10-CM and GEMs web page. The files contain information on the new diagnosis coding system, ICD-10-CM, that is being developed as a replacement for ICD-9-CM, Volumes 1 and 2. This posting includes the following 2015 files:

  • Tabular and index of ICD-10-CM
  • Addenda (changes since the 2012 version)
  • Complete list of ICD-10-CM code titles — long and abbreviated
  • General Equivalence Mappings
  • Reimbursement Mappings
  • Duplicate ICD-9-CM and ICD-10-CM codes

As a reminder, CMS recently posted the 2013 ICD-10-PCS files to the 2015 ICD-10-PCS and GEMs web page. CMS also posted the ICD-10 Medicare Code Editor v 29 (MCE v29 to be used with v29 Definitions Manual) on the ICD-10 MS-DRG Conversion Project web page, along with additional files for the the ICD-10 MS-DRG conversion project.


The Second in Series: General Equivalence Mappings — ICD-9-CM to and from ICD-10-CM and ICD-10-PCS Fact Sheet (May 2009), which provides basic information about the General Equivalence Mappings (GEM) including possible users of the GEMs, why the GEMs are needed, and how the GEMs files are formatted as well as Reimbursement Mappings information, is now available in print format from the Centers for Medicare & Medicaid Services Medicare Learning Network.

To place your order, visit http://www.cms.hhs.gov/MLNGenInfo/, scroll down to "Related Links Inside CMS" and select "MLN Product Ordering Page."

CMS's Fact Sheet on General Equivalence Mappings is a tool to help health care providers and others identify equivalent codes in the ICD-9 and ICD-10 coding systems.