ICD-10 Code C50.222 – Malignant neoplasm of upper-inner quadrant of left male breast (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C50.222 – Malignant neoplasm of upper-inner quadrant of left male breast
What it is
This code identifies a malignant breast tumor located in the upper-inner quadrant of the left breast in a male patient. Use it when documentation specifies both the cancer site and the left-sided male breast.
Clinical signs
Clinical features vary; refer to documentation. Breast cancer may present as a palpable mass, nipple changes, skin dimpling, or localized breast asymmetry, but diagnosis depends on pathologic confirmation and anatomic site.
When to use this code
Use C50.222 when the record clearly states primary malignancy in the upper-inner quadrant of the left male breast. It is appropriate for confirmed cancer diagnoses, oncology follow-up tied to the active site, and pathology-based documentation.
If the note does not specify quadrant, laterality, or male sex, Check documentation before coding. Code the documented breast site exactly as recorded.
Do not use for
Do not use this code for benign breast disease, in situ lesions without invasive malignancy, or unspecified breast cancer locations. Do not guess the quadrant or laterality.
Coding tip
Verify the pathology or oncology note for exact breast quadrant and side before assigning C50.222.