Unspecified type of carcinoma in situ of right breast

This code signifies the presence of abnormal, non-invasive cancer cells confined to the ducts or lobules of the right breast, without further specification of the exact type (e.g., ductal or lobular). These cells have not spread beyond their original location and are considered pre-invasive.

This code is appropriate when pathology reports confirm carcinoma in situ of the right breast, but the specific histological type (e.g., DCIS, LCIS) is not documented or is explicitly stated as unspecified. It is often used for initial diagnoses where further subtyping is pending or when the pathologist cannot definitively classify the in situ lesion.

• Always seek clarification from the provider if the specific type of carcinoma in situ (e.g., ductal, lobular) is not documented, as more specific codes exist.
• Do not use this code if the carcinoma is invasive; refer to codes for malignant neoplasms of the breast.
• Ensure laterality (right breast) is clearly documented to support the use of this specific code.