{"code":"M21.6","type":"code","title":"Other acquired deformities of foot","codeAlso":[],"includes":[],"modern_v":"official26","codeFirst":[],"excludes1":["acquired absence of limb (Z89.-)","congenital absence of limbs (Q71-Q73)","congenital deformities and malformations of limbs (Q65-Q66, Q68-Q74)"],"excludes2":["deformities of toe (acquired) (M20.1-M20.6-)","acquired deformities of fingers or toes (M20.-)","coxa plana (M91.2)","joints of the spine (M40-M54)"],"isBillable":false,"fyEffectivity":{"fy2026":true,"fy2027":true,"billableFy2026":false,"billableFy2027":false},"sibling_codes":["M21.61","M21.611","M21.612","M21.619","M21.62","M21.621","M21.622","M21.629","M21.6X","M21.6X1","M21.6X2","M21.6X9"],"inclusionTerms":[],"sibling_titles":{"code":"M21.6X9","title":"Other acquired deformities of unspecified foot","isBillable":true},"useAdditionalCode":[],"clinicalDefinition":"Other acquired deformities of foot is a non-billable ICD-10-CM category code (M21.6). A more specific billable subcode must be selected for claims submission. Excludes1 (not coded here): acquired absence of limb (Z89.-); congenital absence of limbs (Q71-Q73); congenital deformities and malformations of limbs (Q65-Q66, Q68-Q74). Excludes2 (not included here): deformities of toe (acquired) (M20.1-M20.6-); acquired deformities of fingers or toes (M20.-); coxa plana (M91.2); joints of the spine (M40-M54).","officialDefinition":"Other acquired deformities of foot is a non-billable ICD-10-CM category code (M21.6). A more specific billable subcode must be selected for claims submission. Excludes1 (not coded here): acquired absence of limb (Z89.-); congenital absence of limbs (Q71-Q73); congenital deformities and malformations of limbs (Q65-Q66, Q68-Q74). Excludes2 (not included here): deformities of toe (acquired) (M20.1-M20.6-); acquired deformities of fingers or toes (M20.-); coxa plana (M91.2); joints of the spine (M40-M54).","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":""}