2008 ICD-9-CM Volume 1 Diagnosis Codes Home > Neoplasms 140-239 > Malignant Neoplasm Of Digestive Organs And Peritoneum 150-159 > Malignant Neoplasm Of Gallbladder And Extrahepatic Bile Ducts 156.* > 2008 ICD-9-CM Diagnosis 156.9 Malignant neoplasm of biliary tract part unspecified site  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 Therefore, this code may be out of date.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 156.9 can be accessed here. 156.9 is a specific code that can be used to specify a diagnosis View the ICD-9-CM Volume 1 156.* hierarchy ICD9Data's sister site ProcedureCodes.com launches with the 2008/09 CPT® codes - read more on the ICD9Data.com blog. 156.9 also known as: Malignant neoplasm involving both intrahepatic and extrahepatic bile ducts