ICD-10 Code C50.921 – Malignant neoplasm of unspecified site of right male breast (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C50.921 – Malignant neoplasm of unspecified site of right male breast
What it is
C50.921 identifies a malignant tumor in the right male breast when the exact breast site is not documented. Use it when the record confirms cancer of the right male breast but does not specify a more precise location.
Clinical signs
Clinical features vary; refer to documentation. Common findings include a palpable breast mass, nipple changes, skin dimpling, or discharge, but coding depends on the documented diagnosis rather than symptoms alone.
When to use this code
Use this code when the provider documents primary breast cancer in the right male breast and does not name a specific quadrant or subsite. It also fits when pathology or imaging confirms malignancy, but the site remains unspecified in the final diagnosis.
Choose the more specific breast cancer code if the chart identifies a definite location. If laterality or sex is unclear, check documentation before coding.
Do not use for
Do not use this code for benign breast disease, metastatic disease to the breast, or cancer of a different breast site that is documented more specifically. Check documentation if the record does not clearly state right male breast.
Coding tip
Verify both laterality and sex in the final provider diagnosis before assigning C50.921.