ICD-10-CM > K00-K95 > K35-K38 > K35 > K35.2 > K35.21 > K35.211 K35.211 Acute appendicitis with generalized peritonitis, with perforation and abscess Billable/Specific Copy Code Copy Description Applicable To Appendicitis (acute) with generalized (diffuse) peritonitis following rupture or perforation of appendix, with abscess