ICD-10 Code C43.30 – Malignant melanoma of unspecified part of face (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C43.30 – Malignant melanoma of unspecified part of face
What it is
C43.30 identifies a malignant melanoma on the face when the exact facial site is not documented. It is used for a primary skin cancer arising from melanocytes in an unspecified facial location.
Clinical signs
Clinical features vary; refer to documentation. Melanoma is often described as a changing pigmented lesion, with asymmetry, irregular borders, color variation, or enlargement, but the diagnosis should be supported by pathology or specialist assessment.
When to use this code
Use this code when the record confirms malignant melanoma of the face but does not specify the cheek, forehead, nose, lip, or other exact site. You may also use it when the provider documents a facial melanoma without further anatomic detail.
Verify that the lesion is primary melanoma, not metastasis or another skin cancer. If the documentation later identifies a specific facial subsite, code that more precise location instead.
Do not use for
Do not use C43.30 for benign pigmented lesions, dysplastic nevi, or non-melanoma skin cancers. Do not use it when the chart specifies a different facial subsite or another body location.
Coding tip
Check the pathology report and operative note for the most specific facial site before defaulting to an unspecified code.