{"code":"A39.1","type":"code","title":"Waterhouse-Friderichsen syndrome","codeAlso":[],"includes":[],"modern_v":"official26","codeFirst":[],"excludes1":[],"excludes2":[],"isBillable":true,"fyEffectivity":{"fy2026":true,"fy2027":true,"billableFy2026":true,"billableFy2027":true},"sibling_codes":["A39","A39.0","A39.2","A39.3","A39.4","A39.5","A39.50","A39.51","A39.52","A39.53","A39.8","A39.81","A39.82","A39.83","A39.84","A39.89","A39.9"],"inclusionTerms":["Meningococcal hemorrhagic adrenalitis","Meningococcic adrenal syndrome"],"sibling_titles":{"code":"A39.9","title":"Meningococcal infection, unspecified","isBillable":true},"useAdditionalCode":[],"clinicalDefinition":"Waterhouse-Friderichsen syndrome is a billable ICD-10-CM diagnosis code (A39.1). Inclusion terms: Meningococcal hemorrhagic adrenalitis; Meningococcic adrenal syndrome.","officialDefinition":"Waterhouse-Friderichsen syndrome is a billable ICD-10-CM diagnosis code (A39.1). Inclusion terms: Meningococcal hemorrhagic adrenalitis; Meningococcic adrenal syndrome.","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":""}