{"code":"Q18.0","type":"code","title":"Sinus, fistula and cyst of branchial cleft","codeAlso":[],"includes":[],"modern_v":"official26","codeFirst":[],"excludes1":["cleft lip and cleft palate (Q35-Q37)","conditions classified to Q67.0-Q67.4","congenital malformations of skull and face bones (Q75.-)","cyclopia (Q87.0)","dentofacial anomalies [including malocclusion] (M26.-)","malformation syndromes affecting facial appearance (Q87.0)","persistent thyroglossal duct (Q89.2)"],"excludes2":["congenital malformation of cervical spine (Q05.0, Q05.5, Q67.5, Q76.0-Q76.4)","congenital malformation of larynx (Q31.-)","congenital malformation of lip NEC (Q38.0)","congenital malformation of nose (Q30.-)","congenital malformation of parathyroid gland (Q89.2)","congenital malformation of thyroid gland (Q89.2)"],"isBillable":true,"fyEffectivity":{"fy2026":true,"fy2027":true,"billableFy2026":true,"billableFy2027":true},"sibling_codes":["Q18","Q18.1","Q18.2","Q18.3","Q18.4","Q18.5","Q18.6","Q18.7","Q18.8","Q18.9"],"inclusionTerms":["Branchial vestige"],"sibling_titles":{"code":"Q18.9","title":"Congenital malformation of face and neck, unspecified","isBillable":true},"useAdditionalCode":[],"clinicalDefinition":"Sinus, fistula and cyst of branchial cleft is a billable ICD-10-CM diagnosis code (Q18.0). Inclusion terms: Branchial vestige. Excludes1 (not coded here): cleft lip and cleft palate (Q35-Q37); conditions classified to Q67.0-Q67.4; congenital malformations of skull and face bones (Q75.-); cyclopia (Q87.0); dentofacial anomalies [including malocclusion] (M26.-); malformation syndromes affecting facial appearance (Q87.0); persistent thyroglossal duct (Q89.2).","officialDefinition":"Sinus, fistula and cyst of branchial cleft is a billable ICD-10-CM diagnosis code (Q18.0). Inclusion terms: Branchial vestige. Excludes1 (not coded here): cleft lip and cleft palate (Q35-Q37); conditions classified to Q67.0-Q67.4; congenital malformations of skull and face bones (Q75.-); cyclopia (Q87.0); dentofacial anomalies [including malocclusion] (M26.-); malformation syndromes affecting facial appearance (Q87.0); persistent thyroglossal duct (Q89.2). Excludes2 (not included here): cleft lip and cleft palate (Q35-Q37); congenital malformation of cervical spine (Q05.0, Q05.5, Q67.5, Q76.0-Q76.4); congenital malformation of larynx (Q31.-); congenital malformation of lip NEC (Q38.0); congenital malformation of nose (Q30.-); congenital malformation of parathyroid gland (Q89.2); congenital malformation of thyroid gland (Q89.2).","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":""}