Identification of Substance-involved Emergency Department Visits Using Data From the National Hospital Care Survey.

This report describes the development of methods to identify emergency department (ED) visits involving substance use. Two different algorithms are compared using claims data from the 2013 National Hospital Care Survey (NHCS), a facility-based survey. While NHCS was designed to produce national estimates, this report is based on 2013 data, which are not nationally representative. All material appearing in this report is in the public domain and may be reproduced or copied without permission; citation as to source, however, is appreciated.