{"code":"Z17.421","type":"code","title":"Hormone receptor negative with human epidermal growth factor receptor 2 negative status","codeAlso":[],"includes":[],"modern_v":"official26","codeFirst":["malignant neoplasm, such as:","malignant neoplasm of breast (C50.-)","malignant neoplasm of ovary (C56.-)"],"excludes1":[],"excludes2":[],"isBillable":true,"fyEffectivity":{"fy2026":true,"fy2027":true,"billableFy2026":true,"billableFy2027":true},"inclusionTerms":["HR- with HER2-","TNBC","Triple negative breast cancer"],"useAdditionalCode":[],"clinicalDefinition":"Hormone receptor negative with human epidermal growth factor receptor 2 negative status is a billable ICD-10-CM diagnosis code (Z17.421). Inclusion terms: HR- with HER2-; TNBC; Triple negative breast cancer. Code first: malignant neoplasm, such as:; malignant neoplasm of breast (C50.-); malignant neoplasm of ovary (C56.-).","officialDefinition":"Hormone receptor negative with human epidermal growth factor receptor 2 negative status is a billable ICD-10-CM diagnosis code (Z17.421). Inclusion terms: HR- with HER2-; TNBC; Triple negative breast cancer. Code first: malignant neoplasm, such as:; malignant neoplasm of breast (C50.-); malignant neoplasm of ovary (C56.-).","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":""}