ICD-10 Code C44.391 – Other specified malignant neoplasm of skin of nose (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C44.391 – Other specified malignant neoplasm of skin of nose
What it is
This code identifies a malignant skin tumor on the nose that is not otherwise classified in a more specific skin cancer code. Use it when documentation names a malignant neoplasm of the nasal skin and the record does not support a more precise option.
Clinical signs
Clinical features vary; refer to documentation. Skin cancers of the nose may appear as a persistent lesion, nonhealing area, or abnormal growth, but you should code from the documented diagnosis rather than appearance alone.
When to use this code
Use C44.391 when the provider documents an other specified malignant neoplasm involving the skin of the nose and no more specific histology or site code is recorded. It also fits when the chart clearly supports a malignant skin lesion on the nose, but the exact subtype is not stated.
If the note later specifies a different skin cancer type or a broader facial site, update coding to match the final documentation. Check documentation when the diagnosis is uncertain, provisional, or described only as a suspicious lesion.
Do not use for
Do not use this code for benign nasal lesions, premalignant skin changes, or cancers arising from deeper nasal structures. If the record identifies a more specific skin cancer code, use that instead.
Coding tip
Confirm that “nose” refers to the skin of the nose, not the nasal cavity or another facial site.