{"code":"M79.A12","type":"code","title":"Nontraumatic compartment syndrome of left upper extremity","codeAlso":[],"includes":[],"modern_v":"official26","codeFirst":[", if applicable, associated postprocedural complication"],"excludes1":["compartment syndrome NOS (T79.A-)","fibromyalgia (M79.7)","nontraumatic ischemic infarction of muscle (M62.2-)","traumatic compartment syndrome (T79.A-)","psychogenic rheumatism (F45.8)","soft tissue pain, psychogenic (F45.41)"],"excludes2":[],"isBillable":true,"fyEffectivity":{"fy2026":true,"fy2027":true,"billableFy2026":true,"billableFy2027":true},"inclusionTerms":[],"useAdditionalCode":[],"clinicalDefinition":"Nontraumatic compartment syndrome of left upper extremity is a billable ICD-10-CM diagnosis code (M79.A12). Excludes1 (not coded here): compartment syndrome NOS (T79.A-); fibromyalgia (M79.7); nontraumatic ischemic infarction of muscle (M62.2-); traumatic compartment syndrome (T79.A-); psychogenic rheumatism (F45.8); soft tissue pain, psychogenic (F45.41). Code first: , if applicable, associated postprocedural complication.","officialDefinition":"Nontraumatic compartment syndrome of left upper extremity is a billable ICD-10-CM diagnosis code (M79.A12). Excludes1 (not coded here): compartment syndrome NOS (T79.A-); fibromyalgia (M79.7); nontraumatic ischemic infarction of muscle (M62.2-); traumatic compartment syndrome (T79.A-); psychogenic rheumatism (F45.8); soft tissue pain, psychogenic (F45.41). Code first: , if applicable, associated postprocedural complication.","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":{"psychogenic rheumatism (F45.8)":"M79","soft tissue pain, psychogenic (F45.41)":"M79","compartment syndrome NOS (T79.A-)":"M79.A","fibromyalgia (M79.7)":"M79.A","nontraumatic ischemic infarction of muscle (M62.2-)":"M79.A","traumatic compartment syndrome (T79.A-)":"M79.A",", if applicable, associated postprocedural complication":"M79.A","Nontraumatic compartment syndrome of shoulder, arm, forearm, wrist, hand, and fingers":"M79.A1"},"hcc":{"mapped":false,"model":"CMS-HCC V28","paymentYear":"2026","categories":[],"otherModels":[]}}