{"code":"M62.831","type":"code","title":"Muscle spasm of calf","codeAlso":[],"includes":[],"modern_v":"official26","codeFirst":[],"excludes1":["alcoholic myopathy (G72.1)","cramp and spasm (R25.2)","drug-induced myopathy (G72.0)","myalgia (M79.1-)","stiff-man syndrome (G25.82)","dermatopolymyositis (M33.-)","myopathy in amyloidosis (E85.-)","myopathy in polyarteritis nodosa (M30.0)","myopathy in rheumatoid arthritis (M05.32)","myopathy in scleroderma (M34.-)","myopathy in Sjögren's syndrome (M35.03)","myopathy in systemic lupus erythematosus (M32.-)"],"excludes2":["nontraumatic hematoma of muscle (M79.81)","muscular dystrophies and myopathies (G71-G72)"],"isBillable":true,"fyEffectivity":{"fy2026":true,"fy2027":true,"billableFy2026":true,"billableFy2027":true},"inclusionTerms":["Charley-horse"],"useAdditionalCode":[],"clinicalDefinition":"Muscle spasm of calf is a billable ICD-10-CM diagnosis code (M62.831). Inclusion terms: Charley-horse. Excludes1 (not coded here): alcoholic myopathy (G72.1); cramp and spasm (R25.2); drug-induced myopathy (G72.0); myalgia (M79.1-); stiff-man syndrome (G25.82); dermatopolymyositis (M33.-); myopathy in amyloidosis (E85.-); myopathy in polyarteritis nodosa (M30.0); myopathy in rheumatoid arthritis (M05.32); myopathy in scleroderma (M34.-); myopathy in Sjögren's syndrome (M35.","officialDefinition":"Muscle spasm of calf is a billable ICD-10-CM diagnosis code (M62.831). Inclusion terms: Charley-horse. Excludes1 (not coded here): alcoholic myopathy (G72.1); cramp and spasm (R25.2); drug-induced myopathy (G72.0); myalgia (M79.1-); stiff-man syndrome (G25.82); dermatopolymyositis (M33.-); myopathy in amyloidosis (E85.-); myopathy in polyarteritis nodosa (M30.0); myopathy in rheumatoid arthritis (M05.32); myopathy in scleroderma (M34.-); myopathy in Sjögren's syndrome (M35.03); myopathy in systemic lupus erythematosus (M32.-). Excludes2 (not included here): nontraumatic hematoma of muscle (M79.81); muscular dystrophies and myopathies (G71-G72).","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":false,"model":"CMS-HCC V28","paymentYear":"2026","categories":[],"otherModels":[]}}