The Centers for Medicare & Medicaid Services (CMS) requests that Medicare Administrative Contractors (MACs) utilize certain sets of International Classification of Diseases, Tenth Revision (ICD-10) General Equivalence Mappings (GEMs) files from the CMS web site to the Common Working File (CWF) and update and run certain ICD-10 utilities.
Subject: Implement the International Classification of Diseases, Tenth Revision (ICD-10) 2018 General Equivalence Mappings (GEMs) Tables in the Common Working File (CWF) for Purposes of Processing Non-Group Health Plan (NGHP) Medicare Secondary Payer (MSP) Records and Claims
Release Date: April 7, 2017
Effective Date: October 1, 2017
Implementation Date: October 2, 2017
Special Notes: N/A