{"code":"K35.33","type":"code","title":"Acute appendicitis with perforation, localized peritonitis, and gangrene, with abscess","codeAlso":[],"includes":[],"modern_v":"official26","codeFirst":[],"excludes1":[],"excludes2":[],"isBillable":true,"fyEffectivity":{"fy2026":true,"fy2027":true,"billableFy2026":true,"billableFy2027":true},"sibling_codes":["K35","K35.2","K35.20","K35.200","K35.201","K35.209","K35.21","K35.210","K35.211","K35.219","K35.3","K35.30","K35.31","K35.32","K35.8","K35.80","K35.89","K35.890","K35.891"],"inclusionTerms":["(Acute) appendicitis with (peritoneal) abscess NOS","Ruptured appendix with localized peritonitis and abscess"],"sibling_titles":{"code":"K35.891","title":"Other acute appendicitis without perforation, with gangrene","isBillable":true},"useAdditionalCode":[],"clinicalDefinition":"Acute appendicitis with perforation, localized peritonitis, and gangrene, with abscess is a billable ICD-10-CM diagnosis code (K35.33). Inclusion terms: (Acute) appendicitis with (peritoneal) abscess NOS; Ruptured appendix with localized peritonitis and abscess.","officialDefinition":"Acute appendicitis with perforation, localized peritonitis, and gangrene, with abscess is a billable ICD-10-CM diagnosis code (K35.33). Inclusion terms: (Acute) appendicitis with (peritoneal) abscess NOS; Ruptured appendix with localized peritonitis and abscess.","seventhCharacterInstructions":[],"workflowProtocols":[],"guidelines":{"whenToUse":[],"whenNotToUse":[],"commonBillingMistakes":[],"codeComparisons":[],"documentationChecklist":[]},"domainLandscape":{"summary":"Primary diagnostic domain and clinical landscape evaluation.","keyCategories":[],"diagnosticContinuum":"Progression continuum from acute presentation to resolution."},"children":[],"hierarchy":[],"relatedCodes":[],"relevantCPTCodes":[],"documentationTips":[],"caseStudies":[],"description":"","overview":""}