ICD-10 Code C50.0 – Malignant neoplasm of nipple and areola (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C50.0 – Malignant neoplasm of nipple and areola
What it is
C50.0 identifies a malignant breast tumor arising in the nipple and areola region. Use it when documentation states cancer of the nipple, areola, or the central breast area specifically.
Clinical signs
Findings may include a palpable breast mass, nipple changes, skin distortion, ulceration, or discharge. Clinical features vary; refer to documentation and pathology when available.
When to use this code
Use C50.0 when the provider documents primary breast cancer limited to the nipple and areola. It is appropriate for confirmed malignant neoplasm, including biopsy-supported diagnoses and oncology assessments naming this site.
If the record only says “breast cancer” without a specific location, check documentation before assigning this code. Code the documented primary site rather than assuming the central breast is involved.
Do not use for
Do not use C50.0 for benign breast disease, inflammatory conditions, or lesions of the nipple that are not malignant. Check documentation if the site is unspecified or if the cancer is metastatic from another organ.
Coding tip
Confirm that the nipple or areola is the documented primary site before coding C50.0.