{"code":"M47.021","type":"code","title":"Vertebral artery compression syndromes, occipito-atlanto-axial region","codeAlso":[],"includes":["arthrosis or osteoarthritis of spine","degeneration of facet joints"],"modern_v":"official26","codeFirst":[],"excludes1":[],"excludes2":[],"isBillable":true,"fyEffectivity":{"fy2026":true,"fy2027":true,"billableFy2026":true,"billableFy2027":true},"inclusionTerms":[],"useAdditionalCode":[],"clinicalDefinition":"Vertebral artery compression syndromes, occipito-atlanto-axial region is a billable ICD-10-CM diagnosis code (M47.021). Includes: arthrosis or osteoarthritis of spine; degeneration of facet joints.","officialDefinition":"Vertebral artery compression syndromes, occipito-atlanto-axial region is a billable ICD-10-CM diagnosis code (M47.021). Includes: arthrosis or osteoarthritis of spine; degeneration of facet joints.","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":""}