![]() We used logistic regression models to predict 30-day hospital readmission for the original score in the ICD-9-CM cohort and for each ICD-10-CM algorithm in the ICD-10-CM cohort.ĭistributions of each version of the score were similar. The ICD-9-CM cohort comprised patients who had a hospitalization between Januand March 1, 2015. The ICD-10-CM cohort comprised patients who had a hospitalization between Januand March 1, 2016. We used claims data from the Clinfomatics Data Mart to identify 2 cohorts. The objective of this study is to examine different coding algorithms for the ICD-10-CM combined comorbidity score and compare their performance to the original ICD-9-CM score.įour ICD-10-CM coding algorithms were defined: 2 using General Equivalence Mappings (GEMs), one based on ICD-10-CA (Canadian modification) codes for Charlson and Elixhauser measures, and one including codes from all 3 algorithms. In October 2015, the United States adopted the 10th revision (ICD-10-CM). The combined comorbidity score, which merges the Charlson and Elixhauser comorbidity indices, uses the ninth revision of the International Classification of Diseases, Clinical Modification (ICD-9-CM). ![]()
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