CMR_VERSION indicates the version (yyyy.n) of the Elixhauser Comorbidity Software Refined for ICD-10-CM tool where yyyy indicates the fiscal year for ICD-10-CM diagnosis codes and n indicates the release number within the fiscal year. The Elixhauser Comorbidity Software Refined for ICD-10-CM is valid for ICD-10-CM diagnosis codes from October 1, 2015 (the start of ICD-10-CM) through September of the designated fiscal year. For more information, please refer to the Elixhauser Comorbidity Software Refined for ICD-10-CM page, including a log of changes between versions, of the HCUP User Support website under Tools and Software.