Lobular carcinoma in situ of right breast

This code describes the presence of abnormal cells confined to the lobules of the right breast, which have not invaded surrounding tissue. It represents a non-invasive form of breast cancer, specifically lobular carcinoma in situ (LCIS), located in the right breast.

Use this code when documentation confirms a diagnosis of lobular carcinoma in situ affecting the right breast. This diagnosis is typically made following a biopsy or surgical excision. The pathology report should explicitly state "lobular carcinoma in situ" and specify the "right breast."

• Ensure the laterality (right breast) is clearly documented.
• Do not confuse with invasive lobular carcinoma, which has a different code series.
• This code is often used as a primary diagnosis when LCIS is the reason for the encounter, or as a secondary diagnosis if other conditions are being treated concurrently.