Coding Trend Analyses: Ischemic Stroke

Project Title Coding Trend Analyses: Ischemic Stroke
Date Posted
Tuesday, September 18, 2018

This purpose of this report was to compare the frequency of diagnoses for ischemic stroke using International Classification of Diseases, Ninth Revision, Clinical Modification (ICD-9-CM) versus International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) codes. ICD-10-CM code definitions were determined by mapping from ICD-9-CM code definitions using the Centers for Medicare and Medicaid Services (CMS) General Equivalence Mappings (GEMs). Simple forward mapping (SFM) and forward-backward mapping (FBM) were used to map ICD-9-CM to ICD-10-CM codes. (1)


(1) Fung, K. W., et al. (2016). "Preparing for the ICD-10-CM Transition: Automated Methods for Translating ICD Codes in Clinical Phenotype Definitions." EGEMS (Wash DC) 4(1): 1211.

Health Outcome
ischemic stroke
Time Period
October 1, 2010 - August 31, 2016
Data Sources
Truven Health MarketScan® Research Databases