ICD-10 Code C50.922 – Malignant neoplasm of unspecified site of left male breast (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C50.922 – Malignant neoplasm of unspecified site of left male breast
What it is
C50.922 identifies a malignant breast tumor in the left male breast when the exact site within the breast is not specified. Use it for documented cancer of the left male breast without a more precise subsite.
Clinical signs
Clinical features vary; refer to documentation. Common findings may include a palpable breast mass, nipple changes, skin retraction, or localized breast enlargement, but you should code only what is confirmed.
When to use this code
Use this code when the record states malignant neoplasm of the left male breast and does not identify a more specific location such as the nipple, central portion, or axillary tail. It also fits when laterality is left and the site remains unspecified. If the documentation is unclear, check documentation before assigning the code.
Do not use for
Do not use C50.922 for benign breast disease, female breast cancer, or a clearly documented more specific left breast subsite. If the record names another breast quadrant or site, choose the matching code instead.
Coding tip
Verify both laterality and sex in the note, because this code is specific to left male breast cancer.