Fat necrosis of breast

This code represents a benign inflammatory condition of the breast characterized by the death of adipose tissue, often resulting in a palpable mass. It typically occurs due to trauma, surgery, or radiation therapy, leading to a localized area of hardened, necrotic fat.

Use this code when documentation explicitly states "fat necrosis of breast" as a diagnosis. This condition is frequently identified during breast imaging (mammography, ultrasound, MRI) and may be confirmed by biopsy to rule out malignancy.

• Differentiate from other benign breast conditions like fibroadenoma or cysts, which have distinct codes.
• Ensure the documentation clearly specifies "fat necrosis" and not just a general breast mass without further pathological identification.
• Consider sequencing if the fat necrosis is a complication of a previous procedure (e.g., breast surgery); the complication code may be primary.