Carcinoma in situ of other and unspecified parts of uterus

This code signifies the presence of non-invasive malignant cells confined to the epithelial layer of the uterus, excluding the cervix. It represents an early stage of cancer where the abnormal cells have not yet invaded deeper tissues.

Apply this code when documentation specifies carcinoma in situ affecting the uterine corpus, fundus, or other unspecified parts of the uterus. This diagnosis is typically made following a biopsy or hysteroscopy revealing high-grade dysplasia or carcinoma in situ.

• Differentiate from carcinoma in situ of the cervix (233.0) and invasive uterine cancer.
• Ensure the pathology report explicitly states "in situ" and specifies a uterine location other than the cervix.
• This code is for primary diagnosis; do not use for metastatic disease.