{"code":"E70.40","type":"code","title":"Disorders of histidine metabolism, unspecified","codeAlso":[],"includes":[],"modern_v":"official26","codeFirst":[],"excludes1":["androgen insensitivity syndrome (E34.5-)","congenital adrenal hyperplasia (E25.0)","hemolytic anemias attributable to enzyme disorders (D55.-)","Marfan syndrome (Q87.4-)","5-alpha-reductase deficiency (E29.1)"],"excludes2":["Ehlers-Danlos syndromes (Q79.6-)"],"isBillable":true,"fyEffectivity":{"fy2026":true,"fy2027":true,"billableFy2026":true,"billableFy2027":true},"sibling_codes":["E70","E70.0","E70.1","E70.2","E70.20","E70.21","E70.29","E70.3","E70.30","E70.31","E70.310","E70.311","E70.318","E70.319","E70.32","E70.320","E70.321","E70.328","E70.329","E70.33","E70.330","E70.331","E70.338","E70.339","E70.39","E70.4","E70.41","E70.49","E70.5","E70.8","E70.81","E70.89","E70.9"],"inclusionTerms":[],"sibling_titles":{"code":"E70.9","title":"Disorder of aromatic amino-acid metabolism, unspecified","isBillable":true},"useAdditionalCode":[],"clinicalDefinition":"Disorders of histidine metabolism, unspecified is a billable ICD-10-CM diagnosis code (E70.40). Excludes1 (not coded here): androgen insensitivity syndrome (E34.5-); congenital adrenal hyperplasia (E25.0); hemolytic anemias attributable to enzyme disorders (D55.-); Marfan syndrome (Q87.4-); 5-alpha-reductase deficiency (E29.1). Excludes2 (not included here): Ehlers-Danlos syndromes (Q79.6-).","officialDefinition":"Disorders of histidine metabolism, unspecified is a billable ICD-10-CM diagnosis code (E70.40). Excludes1 (not coded here): androgen insensitivity syndrome (E34.5-); congenital adrenal hyperplasia (E25.0); hemolytic anemias attributable to enzyme disorders (D55.-); Marfan syndrome (Q87.4-); 5-alpha-reductase deficiency (E29.1). Excludes2 (not included here): Ehlers-Danlos syndromes (Q79.6-).","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":"","noteProvenance":{"androgen insensitivity syndrome (E34.5-)":"E70","congenital adrenal hyperplasia (E25.0)":"E70","hemolytic anemias attributable to enzyme disorders (D55.-)":"E70","Marfan syndrome (Q87.4-)":"E70","5-alpha-reductase deficiency (E29.1)":"E70","Ehlers-Danlos syndromes (Q79.6-)":"E70"},"hcc":{"mapped":false,"model":"CMS-HCC V28","paymentYear":"2026","categories":[],"otherModels":[{"model":"CMS-HCC V22","hcc":"23"},{"model":"RxHCC V08","hcc":"43"}]}}