{"code":"K13.21","type":"code","title":"Leukoplakia of oral mucosa, including tongue","codeAlso":[],"includes":["epithelial disturbances of tongue"],"modern_v":"official26","codeFirst":[],"excludes1":["hairy leukoplakia (K13.3)","leukokeratosis nicotina palati (K13.24)","carcinoma in situ of oral epithelium (D00.0-)"],"excludes2":["certain disorders of gingiva and edentulous alveolar ridge (K05-K06)","cysts of oral region (K09.-)","diseases of tongue (K14.-)","stomatitis and related lesions (K12.-)"],"isBillable":true,"fyEffectivity":{"fy2026":true,"fy2027":true,"billableFy2026":true,"billableFy2027":true},"sibling_codes":["K13","K13.0","K13.1","K13.2","K13.22","K13.23","K13.24","K13.29","K13.3","K13.4","K13.5","K13.6","K13.7","K13.70","K13.79"],"inclusionTerms":["Leukokeratosis of oral mucosa","Leukoplakia of gingiva, lips, tongue"],"sibling_titles":{"code":"K13.79","title":"Other lesions of oral mucosa","isBillable":true},"useAdditionalCode":["code to identify:","alcohol abuse and dependence (F10.-)","exposure to environmental tobacco smoke (Z77.22)","exposure to tobacco smoke in the perinatal period (P96.81)","history of tobacco dependence (Z87.891)","occupational exposure to environmental tobacco smoke (Z57.31)","tobacco dependence (F17.-)","tobacco use (Z72.0)"],"clinicalDefinition":"Leukoplakia of oral mucosa, including tongue is a billable ICD-10-CM diagnosis code (K13.21). Includes: epithelial disturbances of tongue. Inclusion terms: Leukokeratosis of oral mucosa; Leukoplakia of gingiva, lips, tongue. Excludes1 (not coded here): hairy leukoplakia (K13.3); leukokeratosis nicotina palati (K13.24); carcinoma in situ of oral epithelium (D00.0-). Excludes2 (not included here): certain disorders of gingiva and edentulous alveolar ridge (K05-K06); cysts of oral region (K09.","officialDefinition":"Leukoplakia of oral mucosa, including tongue is a billable ICD-10-CM diagnosis code (K13.21). Includes: epithelial disturbances of tongue. Inclusion terms: Leukokeratosis of oral mucosa; Leukoplakia of gingiva, lips, tongue. Excludes1 (not coded here): hairy leukoplakia (K13.3); leukokeratosis nicotina palati (K13.24); carcinoma in situ of oral epithelium (D00.0-). Excludes2 (not included here): certain disorders of gingiva and edentulous alveolar ridge (K05-K06); cysts of oral region (K09.-); diseases of tongue (K14.-); stomatitis and related lesions (K12.-). Use additional code: code to identify:; alcohol abuse and dependence (F10.-); exposure to environmental tobacco smoke (Z77.22); exposure to tobacco smoke in the perinatal period (P96.81); history of tobacco dependence (Z87.891); occupational exposure to environmental tobacco smoke (Z57.31); tobacco dependence (F17.-); tobacco use (Z72.0).","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":""}