{"code":"C66.1","type":"code","title":"Malignant neoplasm of right ureter","codeAlso":[],"includes":[],"modern_v":"official26","codeFirst":[],"excludes1":["malignant neoplasm of ureteric orifice of bladder (C67.6)"],"excludes2":[],"isBillable":true,"fyEffectivity":{"fy2026":true,"fy2027":true},"sibling_codes":["C66","C66.2","C66.9"],"inclusionTerms":[],"sibling_titles":{"code":"C66.9","title":"Malignant neoplasm of unspecified ureter","isBillable":true},"useAdditionalCode":[],"clinicalDefinition":"Malignant neoplasm of right ureter is a billable ICD-10-CM diagnosis code (C66.1). Excludes1 (not coded here): malignant neoplasm of ureteric orifice of bladder (C67.6).","officialDefinition":"Malignant neoplasm of right ureter is a billable ICD-10-CM diagnosis code (C66.1). Excludes1 (not coded here): malignant neoplasm of ureteric orifice of bladder (C67.6).","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":""}