ICD-10 Code C50.411 – Malignant neoplasm of upper-outer quadrant of right female breast (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C50.411 – Malignant neoplasm of upper-outer quadrant of right female breast
What it is
This code identifies a malignant tumor located in the upper-outer quadrant of the right female breast. Use it when the documentation specifies both the site and that the patient is female.
Clinical signs
Clinical features vary; refer to documentation. Breast cancer may present as a palpable mass, skin or nipple changes, or abnormal imaging findings, but the coded diagnosis depends on the documented anatomic site.
When to use this code
Use C50.411 when the provider documents primary malignancy in the upper-outer quadrant of the right breast in a female patient. It is appropriate for confirmed cancer diagnoses, including pathology-supported or clearly documented clinical diagnoses. Check documentation if the laterality, quadrant, or sex is unclear.
Do not use for
Do not use this code for benign breast lesions, carcinoma in situ, or malignancy of a different breast quadrant. If the record does not specify the right upper-outer quadrant, choose the more accurate documented code.
Coding tip
Verify laterality, quadrant, and whether the patient is female before assigning C50.411.