2008 ICD-9-CM Volume 1 Diagnosis Codes Home > Diseases Of The Digestive System 520-579 > Diseases Of Esophagus, Stomach, And Duodenum 530-538 > 2008 ICD-9-CM Diagnosis 538 Gastrointestinal mucositis (ulcerative)  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 Therefore, this code may be out of date.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 538 can be accessed here. 538 is a specific code that can be used to specify a diagnosis 538 contains 1 index entry ICD9Data's sister site ProcedureCodes.com launches with the 2008/09 CPT® codes - read more on the ICD9Data.com blog. Use additional E code to identify adverse effects of therapy, such as: antineoplastic and immunosuppressive drugs (E930.7, E933.1) radiation therapy (E879.2) 538 excludes: mucositis (ulcerative) of mouth and oral soft tissue (528.00-528.09) Index entries containing 538: Mucositis - see also Inflammation, by site 528.00 gastrointestinal (ulcerative) 538