GEMs: A Helpful Roadmap to ICD-10-CM

Every journey is easier with a map. Now you can map your course from ICD-9-CM to ICD-10-CM with General Equivalence Mappings (GEMs).

What are GEMs?
General Equivalence Mappings are free, government-authored reference files designed to help you convert data coded in ICD-9-CM to appropriate codes in the ICD-10-CM code set. Published via the United States Centers for Disease Control and Prevention (CDC) ICD-10-CM website, these public domain files make it easier for you to learn how ICD-10-CM works and how to use it.

Access the GEM directory here.

How do GEMs work?
Because very few ICD-9-CM codes have a single direct successor in the ICD-10-CM set, GEMs do not simply translate ICD-9 codes into ICD-10, but instead demonstrate the differences between the two sets and guide you in making informed decisions about how to analyze clinical data and assign the appropriate codes.

Learn more about GEMs here.

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