2006 ICD-9-CM Volume 1 Diagnosis Codes Home > Neoplasms 140-239 > Benign Neoplasms 210-229 > Benign Neoplasm Of Other Parts Of Digestive System 211.* > 2006 ICD-9-CM Diagnosis 211.8 Benign neoplasm of retroperitoneum and peritoneum View the most recent version of ICD-9-CM 211.8 211.8 is a specific code that can be used to specify a diagnosis View the ICD-9-CM Volume 1 211.* hierarchy Alternate Terminology Mesentery Mesocolon Omentum Retroperitoneal tissue