{"code":"X39.01XD","type":"code","title":"Exposure to radon, subsequent encounter","codeAlso":[],"includes":[],"modern_v":"official26","codeFirst":[],"excludes1":["contact with and (suspected) exposure to radon and other naturally occurring radiation (Z77.123)","exposure to man-made radiation (W88-W90)","exposure to sunlight (X32)"],"excludes2":[],"isBillable":true,"fyEffectivity":{"fy2026":true,"fy2027":true,"billableFy2026":true,"billableFy2027":true},"inclusionTerms":[],"useAdditionalCode":[],"clinicalDefinition":"Exposure to radon, subsequent encounter is a billable ICD-10-CM diagnosis code (X39.01D). Excludes1 (not coded here): contact with and (suspected) exposure to radon and other naturally occurring radiation (Z77.123); exposure to man-made radiation (W88-W90); exposure to sunlight (X32). 7th character: The appropriate 7th character is to be added to each code from category X39.","officialDefinition":"Exposure to radon, subsequent encounter is a billable ICD-10-CM diagnosis code (X39.01D). Excludes1 (not coded here): contact with and (suspected) exposure to radon and other naturally occurring radiation (Z77.123); exposure to man-made radiation (W88-W90); exposure to sunlight (X32). 7th character: The appropriate 7th character is to be added to each code from category X39.","seventhCharacterInstructions":["The appropriate 7th character is to be added to each code from category X39"],"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":[]}}