{"code":"G90.52","type":"code","title":"Complex regional pain syndrome I of lower limb","codeAlso":[],"includes":[],"modern_v":"official26","codeFirst":[],"excludes1":["causalgia of lower limb (G57.7-)","causalgia of upper limb (G56.4-)","complex regional pain syndrome II of lower limb (G57.7-)","complex regional pain syndrome II of upper limb (G56.4-)","dysfunction of the autonomic nervous system due to alcohol (G31.2)"],"excludes2":[],"isBillable":false,"fyEffectivity":{"fy2026":true,"fy2027":true,"billableFy2026":false,"billableFy2027":false},"inclusionTerms":[],"useAdditionalCode":[],"clinicalDefinition":"Complex regional pain syndrome I of lower limb is a non-billable ICD-10-CM category code (G90.52). A more specific billable subcode must be selected for claims submission. Excludes1 (not coded here): causalgia of lower limb (G57.7-); causalgia of upper limb (G56.4-); complex regional pain syndrome II of lower limb (G57.7-); complex regional pain syndrome II of upper limb (G56.4-); dysfunction of the autonomic nervous system due to alcohol (G31.2).","officialDefinition":"Complex regional pain syndrome I of lower limb is a non-billable ICD-10-CM category code (G90.52). A more specific billable subcode must be selected for claims submission. Excludes1 (not coded here): causalgia of lower limb (G57.7-); causalgia of upper limb (G56.4-); complex regional pain syndrome II of lower limb (G57.7-); complex regional pain syndrome II of upper limb (G56.4-); dysfunction of the autonomic nervous system due to alcohol (G31.2).","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":""}