D03.39

HCC Category Mapping

What This Code Means

Early-stage melanoma confined to the skin surface on a specific area of the face such as the cheek, nose, forehead, or other facial locations.

Coding Tips

• •Use this code when the specific facial location is documented; always specify which part of the face when possible
• •Distinguish from D03.30 (unspecified facial location) by ensuring the documentation identifies the particular facial area affected

Clinical Significance

Melanoma in situ of other parts of the face captures non-invasive melanocytic neoplasms on specified facial areas such as the cheek, nose, forehead, temple, or chin that have dedicated documentation but no more specific ICD-10-CM code. Lentigo maligna, the most common subtype in this location, occurs on chronically sun-damaged facial skin and can be extensive, requiring careful surgical planning. The face is one of the most common sites for melanoma in situ overall.

Documentation Requirements

• ✓Biopsy-confirmed melanoma in situ with the specific facial subsite documented in the medical record.
• ✓Include the clinical subtype (lentigo maligna, superficial spreading), lesion dimensions, and margin adequacy.
• ✓Treatment modality (excision, Mohs, imiquimod) and follow-up surveillance plan should be recorded.

Commonly Confused Codes