ICD-10 Code C44.511 – Basal cell carcinoma of skin of breast (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C44.511 – Basal cell carcinoma of skin of breast
What it is
This code identifies a basal cell carcinoma arising in the skin of the breast. Use it when the provider documents this specific malignant skin tumor at that site.
Clinical signs
Basal cell carcinoma often appears as a slow-growing pearly or shiny lesion, sometimes with rolled edges, ulceration, or bleeding. Clinical features vary; refer to documentation.
When to use this code
Use C44.511 when the diagnosis is basal cell carcinoma and the record specifies the breast skin as the site. It may be supported by pathology, biopsy, or a clear provider statement. If the lesion is on another breast structure or the site is unclear, check documentation.
Do not use for
Do not use this code for benign skin lesions, non-basal skin cancers, or carcinoma of the breast parenchyma. If the documentation does not confirm basal cell carcinoma of the breast skin, check documentation.
Coding tip
Capture the exact anatomic site and pathology wording, because site-specific skin cancer codes are often chosen from the provider’s documentation.