{"code":"N21.9","type":"code","title":"Calculus of lower urinary tract, unspecified","codeAlso":[],"includes":["calculus of lower urinary tract with cystitis and urethritis"],"modern_v":"official26","codeFirst":[],"excludes1":["calculus of urinary tract NOS (N20.9)"],"excludes2":[],"isBillable":true,"fyEffectivity":{"fy2026":true,"fy2027":true,"billableFy2026":true,"billableFy2027":true},"sibling_codes":["N21","N21.0","N21.1","N21.8"],"inclusionTerms":[],"sibling_titles":{"code":"N21.8","title":"Other lower urinary tract calculus","isBillable":true},"useAdditionalCode":[],"clinicalDefinition":"Calculus of lower urinary tract, unspecified is a billable ICD-10-CM diagnosis code (N21.9). Includes: calculus of lower urinary tract with cystitis and urethritis. Excludes1 (not coded here): calculus of urinary tract NOS (N20.9).","officialDefinition":"Calculus of lower urinary tract, unspecified is a billable ICD-10-CM diagnosis code (N21.9). Includes: calculus of lower urinary tract with cystitis and urethritis. Excludes1 (not coded here): calculus of urinary tract NOS (N20.9).","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":""}