2008 ICD-9-CM Volume 1 Diagnosis Codes Home > Complications Of Pregnancy, Childbirth, And The Puerperium 630-677 > Complications Mainly Related To Pregnancy 640-649 > Other Complications Of Pregnancy Not Elsewhere Classified 646.* > 2008 ICD-9-CM Diagnosis 646.91 Unspecified complication of pregnancy with delivery  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 Therefore, this code may be out of date.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 646.91 can be accessed here. 646.91 is a specific code that can be used to specify a diagnosis View the ICD-9-CM Volume 1 646.* hierarchy ICD9Data's sister site ProcedureCodes.com launches with the 2008/09 CPT® codes - read more on the ICD9Data.com blog.