{"code":"Q83.9","type":"code","title":"Congenital malformation of breast, unspecified","codeAlso":[],"includes":[],"modern_v":"official26","codeFirst":[],"excludes1":[],"excludes2":["absence of pectoral muscle (Q79.8)","hypoplasia of breast (N64.82)","micromastia (N64.82)"],"isBillable":true,"fyEffectivity":{"fy2026":true,"fy2027":true,"billableFy2026":true,"billableFy2027":true},"inclusionTerms":[],"useAdditionalCode":[],"clinicalDefinition":"Congenital malformation of breast, unspecified is a billable ICD-10-CM diagnosis code (Q83.9). Excludes2 (not included here): absence of pectoral muscle (Q79.8); hypoplasia of breast (N64.82); micromastia (N64.82).","officialDefinition":"Congenital malformation of breast, unspecified is a billable ICD-10-CM diagnosis code (Q83.9). Excludes2 (not included here): absence of pectoral muscle (Q79.8); hypoplasia of breast (N64.82); micromastia (N64.82).","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":""}