{"code":"C50.51","type":"code","title":"Malignant neoplasm of lower-outer quadrant of breast, female","codeAlso":[],"includes":["connective tissue of breast","Paget's disease of breast","Paget's disease of nipple"],"modern_v":"official26","codeFirst":[],"excludes1":["skin of breast (C44.501, C44.511, C44.521, C44.591)"],"excludes2":[],"isBillable":false,"fyEffectivity":{"fy2026":true,"fy2027":true,"billableFy2026":false,"billableFy2027":false},"inclusionTerms":[],"useAdditionalCode":["code to identify estrogen, and other hormones and factors receptor status (Z17.-)"],"clinicalDefinition":"Malignant neoplasm of lower-outer quadrant of breast, female is a non-billable ICD-10-CM category code (C50.51). A more specific billable subcode must be selected for claims submission. Includes: connective tissue of breast; Paget's disease of breast; Paget's disease of nipple. Excludes1 (not coded here): skin of breast (C44.501, C44.511, C44.521, C44.591). Use additional code: code to identify estrogen, and other hormones and factors receptor status (Z17.-).","officialDefinition":"Malignant neoplasm of lower-outer quadrant of breast, female is a non-billable ICD-10-CM category code (C50.51). A more specific billable subcode must be selected for claims submission. Includes: connective tissue of breast; Paget's disease of breast; Paget's disease of nipple. Excludes1 (not coded here): skin of breast (C44.501, C44.511, C44.521, C44.591). Use additional code: code to identify estrogen, and other hormones and factors receptor status (Z17.-).","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":""}