ICD-10 Code C50.211 – Malignant neoplasm of upper-inner quadrant of right female breast (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C50.211 – Malignant neoplasm of upper-inner quadrant of right female breast
What it is
This code identifies a malignant tumor located in the upper-inner quadrant of the right female breast. Use it when documentation specifies this exact breast site and laterality.
Clinical signs
Clinical features vary; refer to documentation. Commonly recorded findings include a breast mass, skin or nipple changes, or imaging and biopsy results confirming malignancy in the right upper-inner quadrant.
When to use this code
Use C50.211 when the provider documents primary cancer of the right female breast in the upper-inner quadrant. It is appropriate for confirmed malignancy in this specific location, including pathology-supported diagnoses and problem lists that clearly identify the site.
If the record says only “breast cancer” or does not specify quadrant or laterality, check documentation before coding. You should also verify whether the diagnosis is primary, recurrent, or metastatic, because those details affect code selection.
Do not use for
Do not use this code for unspecified breast sites, left breast disease, or benign breast lesions. Check documentation if the condition is metastatic to the breast or if the quadrant is not clearly stated.
Coding tip
Always confirm both laterality and quadrant in the pathology, imaging, or provider note before assigning C50.211.