{"code":"G45.1","type":"code","title":"Carotid artery syndrome (hemispheric)","codeAlso":[],"includes":[],"modern_v":"official26","codeFirst":[],"excludes1":["neonatal cerebral ischemia (P91.0)","transient retinal artery occlusion (H34.0-)"],"excludes2":[],"isBillable":true,"fyEffectivity":{"fy2026":true,"fy2027":true,"billableFy2026":true,"billableFy2027":true},"sibling_codes":["G45","G45.0","G45.2","G45.3","G45.4","G45.8","G45.9"],"inclusionTerms":[],"sibling_titles":{"code":"G45.9","title":"Transient cerebral ischemic attack, unspecified","isBillable":true},"useAdditionalCode":[],"clinicalDefinition":"Carotid artery syndrome (hemispheric) is a billable ICD-10-CM diagnosis code (G45.1). Excludes1 (not coded here): neonatal cerebral ischemia (P91.0); transient retinal artery occlusion (H34.0-).","officialDefinition":"Carotid artery syndrome (hemispheric) is a billable ICD-10-CM diagnosis code (G45.1). Excludes1 (not coded here): neonatal cerebral ischemia (P91.0); transient retinal artery occlusion (H34.0-).","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":""}