{"code":"D47.09","type":"code","title":"Other mast cell neoplasms of uncertain behavior","codeAlso":[],"includes":[],"modern_v":"official26","codeFirst":[],"excludes1":["congenital cutaneous mastocytosis (Q82.2)","histiocytic neoplasms of uncertain behavior (D47.Z9)","malignant mast cell neoplasm (C96.2-)","neoplasms of unspecified behavior (D49.-)"],"excludes2":[],"isBillable":true,"fyEffectivity":{"fy2026":true,"fy2027":true,"billableFy2026":true,"billableFy2027":true},"inclusionTerms":["Extracutaneous mastocytoma","Mast cell tumor NOS","Mastocytoma NOS","Mastocytosis NOS"],"useAdditionalCode":[],"clinicalDefinition":"Other mast cell neoplasms of uncertain behavior is a billable ICD-10-CM diagnosis code (D47.09). Inclusion terms: Extracutaneous mastocytoma; Mast cell tumor NOS; Mastocytoma NOS; Mastocytosis NOS. Excludes1 (not coded here): congenital cutaneous mastocytosis (Q82.2); histiocytic neoplasms of uncertain behavior (D47.Z9); malignant mast cell neoplasm (C96.2-); neoplasms of unspecified behavior (D49.-).","officialDefinition":"Other mast cell neoplasms of uncertain behavior is a billable ICD-10-CM diagnosis code (D47.09). Inclusion terms: Extracutaneous mastocytoma; Mast cell tumor NOS; Mastocytoma NOS; Mastocytosis NOS. Excludes1 (not coded here): congenital cutaneous mastocytosis (Q82.2); histiocytic neoplasms of uncertain behavior (D47.Z9); malignant mast cell neoplasm (C96.2-); neoplasms of unspecified behavior (D49.-).","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":"","noteProvenance":{"neoplasms of unspecified behavior (D49.-)":"D47","congenital cutaneous mastocytosis (Q82.2)":"D47.0","histiocytic neoplasms of uncertain behavior (D47.Z9)":"D47.0","malignant mast cell neoplasm (C96.2-)":"D47.0"},"hcc":{"mapped":false,"model":"CMS-HCC V28","paymentYear":"2026","categories":[],"otherModels":[{"model":"RxHCC V08","hcc":"21"}]}}