2008 ICD-9-CM Volume 1 Diagnosis Codes Home > Diseases Of The Digestive System 520-579 > Appendicitis 540-543 > Acute Appendicitis 540.* > 2008 ICD-9-CM Diagnosis 540.9 Acute appendicitis without peritonitis  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 Therefore, this code may be out of date.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 540.9 can be accessed here. 540.9 is a specific code that can be used to specify a diagnosis 540.9 contains 1 index entry View the ICD-9-CM Volume 1 540.* hierarchy ICD9Data's sister site ProcedureCodes.com launches with the 2008/09 CPT® codes - read more on the ICD9Data.com blog. 540.9 also known as: Acute: appendicitis without mention of perforation, peritonitis, or rupture: fulminating gangrenous inflamed obstructive cecitis without mention of perforation, peritonitis, or rupture Index entries containing 540.9: Appendicitis 541 acute (catarrhal) (fulminating) (gangrenous) (inflammatory) (obstructive) (retrocecal) (suppurative) 540.9 with perforation, peritonitis, or rupture 540.0 with peritoneal abscess 540.1 peritoneal abscess 540.1