|ECODEn - ICD-9-CM External Cause of Injury Code|
|State Specific Notes|
In the HCUP databases, ICD-9-CM external cause of injury codes (E codes) are represented as 4- to 5-character alphanumeric codes with implicit decimals (i.e., decimals not included). Prior to data year 2014, the HCUP data elements for E Codes are length 5; in 2014, they are length 7. The first digit is the character E with all subsequent digits being numeric. The codes are left-justified in the HCUP databases so that prior to 2014 there is one space following a 4-character E code (three spaces in 2014). For example, the E code E916 would appear as 'E916 ' with a trailing blank in HCUP data and the code E917.1 would appear as 'E9171'.
The storage of E codes in the HCUP databases varies by data year:
E codes are compared to a list of ICD-9-CM codes valid for the discharge date. Anticipation of or lags in response to official ICD-9-CM coding changes are permitted for discharges occurring within a window of time around the official ICD-9-CM coding changes (usually October 1). In the data prior to 1998, a six months window (three months before and three months after) is allowed. Beginning in the 1998 data, a year window (six months before and six months after) is allowed. Invalid and inconsistent E codes are masked directly. Clinical Classifications Software (CCS) data elements are coded with respect to the E code.
|State Specific Notes|
Beginning in data year 2009, hospitals in Arizona are required to report E codes for an injury diagnosis in the range 800-999. In addition, the number of E codes that could be retained on a discharge record increased.
Prior to data year 2010, California did not require the reporting of E-codes in the range E870-E879 (misadventures and abnormal reactions).
District of Columbia
District of Columbia does not report "cause of injury" E-codes separately. During HCUP processing, any E-code encountered in the diagnosis variables are placed in a separate array specific to E codes (ECODEn).
From 2003-2012, Georgia Hospital Association removes from the data any ICD-9-CM diagnosis codes indicating medical misadventures (E870-E879) and adverse reactions (E940-E949).
Incomplete External Cause of Injury code (E code) information in 2005 and 2006
Oklahoma requires E codes to be reported for only the initial treatment of the injury. They are not required for transfers or any secondary treatments. E codes are required whenever there is any diagnosis (primary, secondary) of an injury, poisoning, or adverse effect (ICD-9-CM codes 800-999) and it is the initial treatment for that condition.
South Carolina does not provide to HCUP E-codes in the range E870-E876 (misadventures and abnormal reactions).
West Virginia hospitals were not required to submit E-codes. Thus, these fields were almost 99% missing in the 2007 files.
|Internet Citation: HCUP NIS Description of Data Elements. Healthcare Cost and Utilization Project (HCUP). September 2008. Agency for Healthcare Research and Quality, Rockville, MD. www.hcup-us.ahrq.gov/db/vars/ecoden/nisnote.jsp.|
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|Last modified 9/17/08|