{"code":"H50.639","type":"code","title":"Inferior rectus muscle entrapment, unspecified eye","codeAlso":[],"includes":[],"modern_v":"official26","codeFirst":[],"excludes1":[],"excludes2":["nystagmus and other irregular eye movements (H55)"],"isBillable":true,"fyEffectivity":{"fy2026":true,"fy2027":true,"billableFy2026":true,"billableFy2027":true},"inclusionTerms":[],"useAdditionalCode":[],"clinicalDefinition":"Inferior rectus muscle entrapment, unspecified eye is a billable ICD-10-CM diagnosis code (H50.639). Excludes2 (not included here): nystagmus and other irregular eye movements (H55).","officialDefinition":"Inferior rectus muscle entrapment, unspecified eye is a billable ICD-10-CM diagnosis code (H50.639). Excludes2 (not included here): nystagmus and other irregular eye movements (H55).","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":[]}}