ICD-10 Code C50.121 – Malignant neoplasm of central portion of right male breast (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C50.121 – Malignant neoplasm of central portion of right male breast
What it is
This code identifies a malignant tumor in the central portion of the right breast in a male patient. Use it when documentation specifies both the right side and the central breast location.
Clinical signs
Clinical features may include a palpable breast mass, nipple changes, or local skin or tissue involvement. Diagnosis is confirmed by documentation of malignancy; clinical features vary, so refer to documentation.
When to use this code
Use C50.121 when the provider documents primary breast cancer in the central portion of the right male breast. It is also appropriate when pathology or imaging supports this exact anatomic site and laterality. If the record does not clearly specify location, check documentation before coding.
Do not use for
Do not use this code for benign breast disease, unspecified breast cancer, or cancer of a different breast quadrant or side. If the record only says “male breast cancer” without location, check documentation.
Coding tip
Match the documented laterality and breast subsite exactly; if either is missing, query the provider.