{"code":"H18.21","type":"code","title":"Corneal edema secondary to contact lens","codeAlso":[],"includes":[],"modern_v":"official26","codeFirst":[],"excludes1":[],"excludes2":["other corneal disorders due to contact lens (H18.82-)"],"isBillable":false,"fyEffectivity":{"fy2026":true,"fy2027":true,"billableFy2026":false,"billableFy2027":false},"sibling_codes":["H18.211","H18.212","H18.213","H18.219"],"inclusionTerms":[],"sibling_titles":{"code":"H18.219","title":"Corneal edema secondary to contact lens, unspecified eye","isBillable":true},"useAdditionalCode":[],"clinicalDefinition":"Corneal edema secondary to contact lens is a non-billable ICD-10-CM category code (H18.21). A more specific billable subcode must be selected for claims submission. Excludes2 (not included here): other corneal disorders due to contact lens (H18.82-).","officialDefinition":"Corneal edema secondary to contact lens is a non-billable ICD-10-CM category code (H18.21). A more specific billable subcode must be selected for claims submission. Excludes2 (not included here): other corneal disorders due to contact lens (H18.82-).","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":[]}}