{"code":"G47.42","type":"code","title":"Narcolepsy in conditions classified elsewhere","codeAlso":[],"includes":[],"modern_v":"official26","codeFirst":["underlying condition"],"excludes1":[],"excludes2":["nightmares (F51.5)","nonorganic sleep disorders (F51.-)","sleep terrors (F51.4)","sleepwalking (F51.3)"],"isBillable":false,"fyEffectivity":{"fy2026":true,"fy2027":true,"billableFy2026":false,"billableFy2027":false},"inclusionTerms":[],"useAdditionalCode":[],"clinicalDefinition":"Narcolepsy in conditions classified elsewhere is a non-billable ICD-10-CM category code (G47.42). A more specific billable subcode must be selected for claims submission. Excludes2 (not included here): nightmares (F51.5); nonorganic sleep disorders (F51.-); sleep terrors (F51.4); sleepwalking (F51.3). Code first: underlying condition.","officialDefinition":"Narcolepsy in conditions classified elsewhere is a non-billable ICD-10-CM category code (G47.42). A more specific billable subcode must be selected for claims submission. Excludes2 (not included here): nightmares (F51.5); nonorganic sleep disorders (F51.-); sleep terrors (F51.4); sleepwalking (F51.3). Code first: underlying condition.","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":""}