ICD-10 Code C44.321 – Squamous cell carcinoma of skin of nose (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C44.321 – Squamous cell carcinoma of skin of nose
What it is
C44.321 identifies a malignant squamous cell carcinoma arising on the skin of the nose. Use it when documentation specifies this exact anatomic site and skin origin.
Clinical signs
Typical findings include a persistent, enlarging, scaly, crusted, or ulcerated lesion on the nasal skin. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents squamous cell carcinoma of the skin on the nose, including pathology-confirmed cases. It is appropriate for initial diagnosis, follow-up visits, and encounters focused on this specific lesion. Check documentation if the site is described more broadly.
Do not use for
Do not use it for squamous cell carcinoma of non-skin sites or for lesions on other parts of the face. Do not assume the code applies if the record only says “skin cancer” without confirming the nose.
Coding tip
Match the documented site exactly; if the nose is not clearly specified, query the provider before assigning C44.321.