{"code":"M66.8","type":"code","title":"Spontaneous rupture of other tendons","codeAlso":[],"includes":["rupture that occurs when a normal force is applied to tissues that are inferred to have less than normal strength"],"modern_v":"official26","codeFirst":[],"excludes1":[],"excludes2":["rotator cuff syndrome (M75.1-)","rupture where an abnormal force is applied to normal tissue - see injury of tendon by body region"],"isBillable":false,"fyEffectivity":{"fy2026":true,"fy2027":true},"sibling_codes":["M66.80","M66.81","M66.811","M66.812","M66.819","M66.82","M66.821","M66.822","M66.829","M66.83","M66.831","M66.832","M66.839","M66.84","M66.841","M66.842","M66.849","M66.85","M66.851","M66.852","M66.859","M66.86","M66.861","M66.862","M66.869","M66.87","M66.871","M66.872","M66.879","M66.88","M66.89"],"inclusionTerms":[],"sibling_titles":{"code":"M66.89","title":"Spontaneous rupture of other tendons, multiple sites","isBillable":true},"useAdditionalCode":[],"clinicalDefinition":"Spontaneous rupture of other tendons is a non-billable ICD-10-CM category code (M66.8). A more specific billable subcode must be selected for claims submission. Includes: rupture that occurs when a normal force is applied to tissues that are inferred to have less than normal strength. Excludes2 (not included here): rotator cuff syndrome (M75.1-); rupture where an abnormal force is applied to normal tissue - see injury of tendon by body region.","officialDefinition":"Spontaneous rupture of other tendons is a non-billable ICD-10-CM category code (M66.8). A more specific billable subcode must be selected for claims submission. Includes: rupture that occurs when a normal force is applied to tissues that are inferred to have less than normal strength. Excludes2 (not included here): rotator cuff syndrome (M75.1-); rupture where an abnormal force is applied to normal tissue - see injury of tendon by body region.","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":""}