{"code":"Q96.4","type":"code","title":"Mosaicism, 45, X/other cell line(s) with abnormal sex chromosome","codeAlso":[],"includes":[],"modern_v":"official26","codeFirst":[],"excludes1":["Noonan syndrome (Q87.19)"],"excludes2":["mitochondrial metabolic disorders (E88.4-)"],"isBillable":true,"fyEffectivity":{"fy2026":true,"fy2027":true,"billableFy2026":true,"billableFy2027":true},"sibling_codes":["Q96","Q96.0","Q96.1","Q96.2","Q96.3","Q96.8","Q96.9"],"inclusionTerms":[],"sibling_titles":{"code":"Q96.9","title":"Turner's syndrome, unspecified","isBillable":true},"useAdditionalCode":[],"clinicalDefinition":"Mosaicism, 45, X/other cell line(s) with abnormal sex chromosome is a billable ICD-10-CM diagnosis code (Q96.4). Excludes1 (not coded here): Noonan syndrome (Q87.19). Excludes2 (not included here): mitochondrial metabolic disorders (E88.4-).","officialDefinition":"Mosaicism, 45, X/other cell line(s) with abnormal sex chromosome is a billable ICD-10-CM diagnosis code (Q96.4). Excludes1 (not coded here): Noonan syndrome (Q87.19). Excludes2 (not included here): mitochondrial metabolic disorders (E88.4-).","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":""}