{"code":"B27.12","type":"code","title":"Cytomegaloviral mononucleosis with meningitis","codeAlso":[],"includes":["glandular fever","monocytic angina","Pfeiffer's disease"],"modern_v":"official26","codeFirst":[],"excludes1":[],"excludes2":[],"isBillable":true,"fyEffectivity":{"fy2026":true,"fy2027":true,"billableFy2026":true,"billableFy2027":true},"sibling_codes":["B27","B27.0","B27.00","B27.01","B27.02","B27.09","B27.1","B27.10","B27.11","B27.19","B27.8","B27.80","B27.81","B27.82","B27.89","B27.9","B27.90","B27.91","B27.92","B27.99"],"inclusionTerms":[],"sibling_titles":{"code":"B27.99","title":"Infectious mononucleosis, unspecified with other complication","isBillable":true},"useAdditionalCode":[],"clinicalDefinition":"Cytomegaloviral mononucleosis with meningitis is a billable ICD-10-CM diagnosis code (B27.12). Includes: glandular fever; monocytic angina; Pfeiffer's disease.","officialDefinition":"Cytomegaloviral mononucleosis with meningitis is a billable ICD-10-CM diagnosis code (B27.12). Includes: glandular fever; monocytic angina; Pfeiffer's disease.","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":""}