{"code":"Q28.1","type":"code","title":"Other malformations of precerebral vessels","codeAlso":[],"includes":[],"modern_v":"official26","codeFirst":[],"excludes1":["congenital aneurysm NOS (Q27.8)","congenital coronary aneurysm (Q24.5)","ruptured cerebral arteriovenous malformation (I60.8)","ruptured malformation of precerebral vessels (I72.0)"],"excludes2":["congenital peripheral aneurysm (Q27.8)","congenital pulmonary aneurysm (Q25.79)","congenital retinal aneurysm (Q14.1)"],"isBillable":true,"fyEffectivity":{"fy2026":true,"fy2027":true,"billableFy2026":true,"billableFy2027":true},"inclusionTerms":["Congenital malformation of precerebral vessels NOS","Congenital precerebral aneurysm (nonruptured)"],"useAdditionalCode":[],"clinicalDefinition":"Other malformations of precerebral vessels is a billable ICD-10-CM diagnosis code (Q28.1). Inclusion terms: Congenital malformation of precerebral vessels NOS; Congenital precerebral aneurysm (nonruptured). Excludes1 (not coded here): congenital aneurysm NOS (Q27.8); congenital coronary aneurysm (Q24.5); ruptured cerebral arteriovenous malformation (I60.8); ruptured malformation of precerebral vessels (I72.0). Excludes2 (not included here): congenital peripheral aneurysm (Q27.8); congenital pulmonary aneurysm (Q25.79); congenital retinal aneurysm (Q14.1).","officialDefinition":"Other malformations of precerebral vessels is a billable ICD-10-CM diagnosis code (Q28.1). Inclusion terms: Congenital malformation of precerebral vessels NOS; Congenital precerebral aneurysm (nonruptured). Excludes1 (not coded here): congenital aneurysm NOS (Q27.8); congenital coronary aneurysm (Q24.5); ruptured cerebral arteriovenous malformation (I60.8); ruptured malformation of precerebral vessels (I72.0). Excludes2 (not included here): congenital peripheral aneurysm (Q27.8); congenital pulmonary aneurysm (Q25.79); congenital retinal aneurysm (Q14.1).","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":""}