{"code":"C48.0","type":"code","title":"Malignant neoplasm of retroperitoneum","codeAlso":[],"includes":[],"modern_v":"official26","codeFirst":[],"excludes1":["Kaposi's sarcoma of connective tissue (C46.1)","mesothelioma (C45.-)"],"excludes2":[],"isBillable":true,"fyEffectivity":{"fy2026":true,"fy2027":true,"billableFy2026":true,"billableFy2027":true},"sibling_codes":["C48","C48.1","C48.2","C48.8"],"inclusionTerms":[],"sibling_titles":{"code":"C48.8","title":"Malignant neoplasm of overlapping sites of retroperitoneum and peritoneum","isBillable":true},"useAdditionalCode":[],"clinicalDefinition":"Malignant neoplasm of retroperitoneum is a billable ICD-10-CM diagnosis code (C48.0). Excludes1 (not coded here): Kaposi's sarcoma of connective tissue (C46.1); mesothelioma (C45.-).","officialDefinition":"Malignant neoplasm of retroperitoneum is a billable ICD-10-CM diagnosis code (C48.0). Excludes1 (not coded here): Kaposi's sarcoma of connective tissue (C46.1); mesothelioma (C45.-).","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":""}