C43.8
✓ BillableMalignant melanoma of overlapping sites of skin
Neoplasms (C00-D49)
❌ Excludes1
inheritedRules inherited from parent codes in the hierarchy.
- • melanoma in situ (D03.-)
⚠️ Excludes2
inheritedRules inherited from parent codes.
- • 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
Clinical Description
ICD-10-CM code C43.8 represents malignant melanoma of overlapping sites of skin. This code falls under the Neoplasms (C00-D49) classification. It is a billable/specific code valid for HIPAA-covered transactions as of October 1, 2025 (FY2026). This code can be used to indicate a diagnosis for reimbursement purposes on insurance claims.
This is a 5-character code at the 4th level of specificity. This is the most specific code available in this subcategory. Coders should note that C43.8 has 1 Excludes1 restriction(s) — codes that cannot be reported together on the same claim.
Frequently Asked Questions
What is ICD-10 code C43.8?
ICD-10-CM code C43.8 is "Malignant melanoma of overlapping sites of skin". It belongs to the category: Neoplasms (C00-D49).
Is C43.8 a billable ICD-10 code?
Yes, C43.8 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
What codes are excluded with C43.8?
C43.8 has 1 Excludes1 rule(s). These codes are mutually exclusive and cannot be coded together on the same claim.
Can C43.8 be coded with other codes?
C43.8 has 3 Excludes2 note(s). These conditions can be coded together if both are documented in the patient record.
Related Codes in C43
Other codes in the same category that may be relevant for differential coding:
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Data Source
CMS ICD-10-CM 2026 Tabular List
Updated October 1, 2025 (FY2026)