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February 2017

Incorrect ICD-9 Codes and Percentages

JAMA Cardiol. 2017;2(2):230. doi:10.1001/jamacardio.2016.5452

In the Original Investigation by Kim et al titled “Hospital Volume Outcomes After Septal Myectomy and Alcohol Septal Ablation for Treatment of Obstructive Hypertrophic Cardiomyopathy: US Nationwide Inpatient Database, 2003-2011,” published online April 27, 2016, and also in the June 2016 print issue of JAMA Cardiology,1 the incorrect International Classification of Diseases, Ninth Revision codes were used for septal myectomy (36.33) and septal ablation (36.34). The following codes should have been used: 37.33 (excision of heart tissue) and 37.34 (ablation of heart tissue).

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