Personal history of in-situ neoplasm of breast

This code indicates a patient's past medical history of a non-invasive, localized breast cancer that has not spread beyond its original site. This refers to carcinoma in situ (CIS) of the breast, where abnormal cells are present but confined to the ducts or lobules. It signifies that the patient has been treated for and no longer has active in-situ breast cancer.

Use this code when documenting a patient's history of ductal carcinoma in situ (DCIS) or lobular carcinoma in situ (LCIS) of the breast, after the in-situ neoplasm has been successfully treated and is no longer active. It is appropriate for follow-up visits, screenings, or for any encounter where the patient's past medical history of in-situ breast cancer is relevant to their current care.

• Do not use this code for active in-situ breast cancer; use the appropriate C00-D49 code for current disease.
• This code is for a personal history, not a family history.
• Always sequence this code as a secondary diagnosis, as it represents a historical condition influencing current care.