{"code":"M43.3","type":"code","title":"Recurrent atlantoaxial dislocation with myelopathy","codeAlso":[],"includes":[],"modern_v":"official26","codeFirst":[],"excludes1":["congenital spondylolysis and spondylolisthesis (Q76.2)","hemivertebra (Q76.3-Q76.4)","Klippel-Feil syndrome (Q76.1)","lumbarization and sacralization (Q76.4)","platyspondylisis (Q76.4)","spina bifida occulta (Q76.0)","spinal curvature in osteoporosis (M80.-)","spinal curvature in Paget's disease of bone [osteitis deformans] (M88.-)"],"excludes2":[],"isBillable":true,"fyEffectivity":{"fy2026":true,"fy2027":true},"inclusionTerms":[],"useAdditionalCode":[],"clinicalDefinition":"Recurrent atlantoaxial dislocation with myelopathy is a billable ICD-10-CM diagnosis code (M43.3). Excludes1 (not coded here): congenital spondylolysis and spondylolisthesis (Q76.2); hemivertebra (Q76.3-Q76.4); Klippel-Feil syndrome (Q76.1); lumbarization and sacralization (Q76.4); platyspondylisis (Q76.4); spina bifida occulta (Q76.0); spinal curvature in osteoporosis (M80.-); spinal curvature in Paget's disease of bone [osteitis deformans] (M88.-).","officialDefinition":"Recurrent atlantoaxial dislocation with myelopathy is a billable ICD-10-CM diagnosis code (M43.3). Excludes1 (not coded here): congenital spondylolysis and spondylolisthesis (Q76.2); hemivertebra (Q76.3-Q76.4); Klippel-Feil syndrome (Q76.1); lumbarization and sacralization (Q76.4); platyspondylisis (Q76.4); spina bifida occulta (Q76.0); spinal curvature in osteoporosis (M80.-); spinal curvature in Paget's disease of bone [osteitis deformans] (M88.-).","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":""}