{"code":"Q26.4","type":"code","title":"Anomalous pulmonary venous connection, unspecified","codeAlso":[],"includes":[],"modern_v":"official26","codeFirst":[],"excludes1":[],"excludes2":[],"isBillable":true,"fyEffectivity":{"fy2026":true,"fy2027":true,"billableFy2026":true,"billableFy2027":true},"sibling_codes":["Q26","Q26.0","Q26.1","Q26.2","Q26.3","Q26.5","Q26.6","Q26.8","Q26.9"],"inclusionTerms":[],"sibling_titles":{"code":"Q26.9","title":"Congenital malformation of great vein, unspecified","isBillable":true},"useAdditionalCode":[],"clinicalDefinition":"Anomalous pulmonary venous connection, unspecified is a billable ICD-10-CM diagnosis code (Q26.4).","officialDefinition":"Anomalous pulmonary venous connection, unspecified is a billable ICD-10-CM diagnosis code (Q26.4).","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":""}