2008 ICD-9-CM Volume 1 Diagnosis Codes Home > Supplementary Classification Of External Causes Of Injury And Poisoning E800-E999 > Motor Vehicle Traffic Accidents E810-E819 > 2008 ICD-9-CM Diagnosis E811 Motor vehicle traffic accident involving re-entrant collision with another motor vehicle  On October 1, 2008 the 2009 ICD-9-CM codes came into effect. Therefore, this code may be out of date. The 2009 version of ICD-9-CM E811 can be accessed here. E811 is a non-specific code that cannot be used to specify a diagnosis ICD9Data's sister site ProcedureCodes.com launches with the 2008/09 CPT® codes - read more on the ICD9Data.com blog. E811 includes: collision between motor vehicle which accidentally leaves the roadway then re-enters the same roadway, or the opposite roadway on a divided highway, and another motor vehicle E811 excludes: collision on the same roadway when none of the motor vehicles involved have left and re-entered the roadway (E812.0-E812.9)