{"code":"M05.662","type":"code","title":"Rheumatoid arthritis of left knee with involvement of other organs and systems","codeAlso":[],"includes":[],"modern_v":"official26","codeFirst":[],"excludes1":["rheumatic fever (I00)","juvenile rheumatoid arthritis (M08.-)","rheumatoid arthritis of spine (M45.-)"],"excludes2":[],"isBillable":true,"fyEffectivity":{"fy2026":true,"fy2027":true,"billableFy2026":true,"billableFy2027":true},"inclusionTerms":[],"useAdditionalCode":[],"clinicalDefinition":"Rheumatoid arthritis of left knee with involvement of other organs and systems is a billable ICD-10-CM diagnosis code (M05.662). Excludes1 (not coded here): rheumatic fever (I00); juvenile rheumatoid arthritis (M08.-); rheumatoid arthritis of spine (M45.-).","officialDefinition":"Rheumatoid arthritis of left knee with involvement of other organs and systems is a billable ICD-10-CM diagnosis code (M05.662). Excludes1 (not coded here): rheumatic fever (I00); juvenile rheumatoid arthritis (M08.-); rheumatoid arthritis of spine (M45.-).","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":true,"model":"CMS-HCC V28","paymentYear":"2026","categories":[{"hcc":"93","label":"Rheumatoid Arthritis and Other Specified Inflammatory Rheumatic Disorders","family":"MSK","suppresses":[{"hcc":"94","label":"Systemic Lupus Erythematosus and Other Specified Systemic Connective Tissue Disorders"}]}],"otherModels":[{"model":"CMS-HCC V22","hcc":"40"},{"model":"RxHCC V08","hcc":"83"}]}}