ICD-10 Code C44.311 – Basal cell carcinoma of skin of nose (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C44.311 – Basal cell carcinoma of skin of nose
What it is
This code identifies basal cell carcinoma located on the skin of the nose. Use it when the documentation specifies a basal cell malignancy at that exact site.
Clinical signs
Typical findings include a slowly growing pearly or waxy lesion, sometimes with surface blood vessels, ulceration, or a nonhealing sore. Clinical features vary; refer to documentation.
When to use this code
Use C44.311 when the provider documents basal cell carcinoma of the skin of the nose, including biopsy-confirmed or clinically diagnosed cases. You may also use it when the record clearly states the nasal skin as the primary site. If the note only says “nose lesion” or “skin cancer,” check documentation.
Do not use for
Do not use this code for basal cell carcinoma at another facial site or for non-melanoma skin cancers not documented as basal cell. Do not assign it when the anatomic site is unclear.
Coding tip
Verify both histology and exact nasal skin location before assigning C44.311.