ICD-10 Code D03.3 – Melanoma in situ of other and unspecified parts of face (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code D03.3 – Melanoma in situ of other and unspecified parts of face
What it is
D03.3 identifies melanoma in situ located on other or unspecified parts of the face. The lesion is confined to the epidermis and has not invaded deeper tissue.
Clinical signs
Clinical features vary; refer to documentation. Typical notes describe a suspicious facial pigmented lesion with asymmetry, border irregularity, color variation, or change over time, confirmed by pathology as in situ disease.
When to use this code
Use D03.3 when the provider documents melanoma in situ on a facial site not specifically named elsewhere, such as cheek, forehead, or other unspecified facial skin. Code it only when pathology or clear clinical documentation supports in situ melanoma. If the record names a more specific facial subsite, use that documented code instead.
Do not use for
Do not use this code for invasive melanoma, benign nevi, or dysplastic lesions without melanoma. Check documentation if the lesion is on the lip, eyelid, or another site with a more specific code.
Coding tip
Verify both the in situ diagnosis and the exact facial location before assigning D03.3.