{"code":"C43.9","type":"code","title":"Malignant melanoma of skin, unspecified","codeAlso":[],"includes":[],"modern_v":"official26","codeFirst":[],"excludes1":["melanoma in situ (D03.-)"],"excludes2":["malignant melanoma of skin of genital organs (C51-C52, C60.-, C63.-)","Merkel cell carcinoma (C4A.-)","sites other than skin-code to malignant neoplasm of the site"],"isBillable":true,"fyEffectivity":{"fy2026":true,"fy2027":true,"billableFy2026":true,"billableFy2027":true},"sibling_codes":["C43","C43.0","C43.1","C43.111","C43.112","C43.121","C43.122","C43.2","C43.3","C43.4","C43.5","C43.6","C43.7","C43.8"],"inclusionTerms":["Malignant melanoma of unspecified site of skin","Melanoma (malignant) NOS"],"sibling_titles":{"code":"C43.8","title":"Malignant melanoma of overlapping sites of skin","isBillable":true},"useAdditionalCode":[],"clinicalDefinition":"Malignant melanoma of skin, unspecified is a billable ICD-10-CM diagnosis code (C43.9). Inclusion terms: Malignant melanoma of unspecified site of skin; Melanoma (malignant) NOS. Excludes1 (not coded here): melanoma in situ (D03.-). Excludes2 (not included here): malignant melanoma of skin of genital organs (C51-C52, C60.-, C63.-); Merkel cell carcinoma (C4A.-); sites other than skin-code to malignant neoplasm of the site.","officialDefinition":"Malignant melanoma of skin, unspecified is a billable ICD-10-CM diagnosis code (C43.9). Inclusion terms: Malignant melanoma of unspecified site of skin; Melanoma (malignant) NOS. Excludes1 (not coded here): melanoma in situ (D03.-). Excludes2 (not included here): malignant melanoma of skin of genital organs (C51-C52, C60.-, C63.-); Merkel cell carcinoma (C4A.-); sites other than skin-code to malignant neoplasm of the site.","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":""}