2006 ICD-9-CM Volume 1 Diagnosis Codes Home > Diseases Of The Digestive System 520-579 > Appendicitis 540-543 > Acute Appendicitis 540.* > 2006 ICD-9-CM Diagnosis 540.1 Acute appendicitis with peritoneal abscess View the most recent version of ICD-9-CM 540.1 540.1 is a specific code that can be used to specify a diagnosis 540.1 contains 21 index entries View the ICD-9-CM Volume 1 540.* hierarchy Alternate Terminology Abscess of appendix With generalized peritonitis  Index entries containing 540.1: Abscess (acute) (chronic) (infectional) (lymphangitic) (metastatic) (multiple) (pyogenic) (septic) (with lymphangitis) (see also Cellulitis) 682.9 appendix 540.1 cecum 569.5 with appendicitis 540.1 ileocecal 540.1 iliac (region) 682.2 fossa 540.1 periappendiceal 540.1 pericecal 540.1 peritoneum, peritoneal (perforated) (ruptured) 567.22 with appendicitis 540.1 perityphlic 540.1 postcecal 540.1 subcecal 540.1 vermiform appendix 540.1 Appendicitis 541 with perforation, peritonitis (generalized), or rupture 540.0 with peritoneal abscess 540.1 peritoneal abscess 540.1 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 Perforation, perforative (nontraumatic) appendix 540.0 with peritoneal abscess 540.1 cecum 540.0 with peritoneal abscess 540.1 Peritonitis (acute) (adhesive) (fibrinous) (hemorrhagic) (idiopathic) (localized) (perforative) (primary) (with adhesions) (with effusion) 567.9 with or following appendicitis 540.0 with peritoneal abscess 540.1 Phlegmon (see also Abscess) 682.9 iliac 682.2 fossa 540.1 Rupture, ruptured 553.9 appendix (with peritonitis) 540.0 with peritoneal abscess 540.1 cecum (with peritonitis) 540.0 with peritoneal abscess 540.1