ICD-10 Code C50.A1 – Malignant inflammatory neoplasm of right breast (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C50.A1 – Malignant inflammatory neoplasm of right breast
What it is
This code identifies a malignant inflammatory cancer of the right breast. Use it when the documentation specifically states inflammatory carcinoma or inflammatory malignant neoplasm involving the right breast.
Clinical signs
Typical findings may include breast swelling, redness, warmth, and skin thickening or peau d’orange. Clinical features vary; refer to documentation and pathology or imaging reports when available.
When to use this code
Use this code when the provider documents a malignant inflammatory neoplasm of the right breast, including inflammatory carcinoma. It is appropriate for confirmed right-sided disease in the breast, not for nonspecific breast masses or inflammation alone. Check documentation if laterality is unclear.
Do not use for
Do not use it for benign mastitis, abscess, or unspecified breast cancer. Do not use if the record does not clearly identify an inflammatory malignant process in the right breast.
Coding tip
Verify both malignancy and laterality in the final diagnosis before assigning C50.A1.