Fibroadenosis of left breast

This code represents a benign, non-cancerous condition of the left breast characterized by an overgrowth of fibrous and glandular tissue. It often presents as diffuse, firm, and sometimes painful areas within the breast, typically fluctuating with hormonal cycles.

Use this code when documentation specifies fibroadenosis affecting the left breast. This diagnosis is commonly made after clinical examination, mammography, ultrasound, or sometimes biopsy, confirming the benign nature of the tissue changes.

• Ensure the documentation clearly specifies "fibroadenosis" and the laterality as "left breast."
• Do not confuse with fibroadenoma (D24.-), which is a distinct benign tumor, or other forms of benign mammary dysplasia.
• Code any associated symptoms, such as breast pain (N64.4), as secondary diagnoses if documented.