{"code":"G13.1","type":"code","title":"Other systemic atrophy primarily affecting central nervous system in neoplastic disease","codeAlso":[],"includes":[],"modern_v":"official26","codeFirst":["underlying neoplasm (C00-D49)"],"excludes1":[],"excludes2":[],"isBillable":true,"fyEffectivity":{"fy2026":true,"fy2027":true,"billableFy2026":true,"billableFy2027":true},"sibling_codes":["G13","G13.0","G13.2","G13.8"],"inclusionTerms":["Paraneoplastic limbic encephalopathy"],"sibling_titles":{"code":"G13.8","title":"Systemic atrophy primarily affecting central nervous system in other diseases classified elsewhere","isBillable":true},"useAdditionalCode":[],"clinicalDefinition":"Other systemic atrophy primarily affecting central nervous system in neoplastic disease is a billable ICD-10-CM diagnosis code (G13.1). Inclusion terms: Paraneoplastic limbic encephalopathy. Code first: underlying neoplasm (C00-D49).","officialDefinition":"Other systemic atrophy primarily affecting central nervous system in neoplastic disease is a billable ICD-10-CM diagnosis code (G13.1). Inclusion terms: Paraneoplastic limbic encephalopathy. Code first: underlying neoplasm (C00-D49).","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":"","hcc":{"mapped":false,"model":"CMS-HCC V28","paymentYear":"2026","categories":[],"otherModels":[{"model":"CMS-HCC V22","hcc":"75"},{"model":"RxHCC V08","hcc":"158"}]}}