{"code":"Q23.81","type":"code","title":"Bicuspid aortic valve","codeAlso":[", if applicable, acquired aortic valve disorders, such as:","aortic (valve) insufficiency (nonrheumatic) (I35.1)","aortic (valve) stenosis (nonrheumatic) (I35.0)","aortic (valve) stenosis with insufficiency (nonrheumatic) (I35.2)"],"includes":[],"modern_v":"official26","codeFirst":[],"excludes1":[],"excludes2":[],"isBillable":true,"fyEffectivity":{"fy2026":true,"fy2027":true,"billableFy2026":true,"billableFy2027":true},"inclusionTerms":["Congenital bicuspid aortic valve","Unicuspid (congenital) aortic valve (at birth)"],"useAdditionalCode":[],"clinicalDefinition":"Bicuspid aortic valve is a billable ICD-10-CM diagnosis code (Q23.81). Inclusion terms: Congenital bicuspid aortic valve; Unicuspid (congenital) aortic valve (at birth). Code also: , if applicable, acquired aortic valve disorders, such as:; aortic (valve) insufficiency (nonrheumatic) (I35.1); aortic (valve) stenosis (nonrheumatic) (I35.0); aortic (valve) stenosis with insufficiency (nonrheumatic) (I35.2).","officialDefinition":"Bicuspid aortic valve is a billable ICD-10-CM diagnosis code (Q23.81). Inclusion terms: Congenital bicuspid aortic valve; Unicuspid (congenital) aortic valve (at birth). Code also: , if applicable, acquired aortic valve disorders, such as:; aortic (valve) insufficiency (nonrheumatic) (I35.1); aortic (valve) stenosis (nonrheumatic) (I35.0); aortic (valve) stenosis with insufficiency (nonrheumatic) (I35.2).","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":""}