Carcinoma in situ of bladder

This code represents a non-invasive malignant neoplasm confined to the epithelial layer of the bladder, meaning the cancerous cells have not yet invaded the underlying connective tissue or muscle. It is considered a pre-invasive form of cancer, often detected during surveillance for bladder abnormalities.

Use this code when documentation explicitly states "carcinoma in situ of bladder" or "CIS of bladder." This diagnosis is typically confirmed by biopsy and subsequent histopathological examination. It is often found during cystoscopy for hematuria or follow-up for previous bladder lesions.

• Do not confuse with invasive bladder cancer (C67.-) or benign neoplasms of the bladder (D30.3).
• Ensure the pathology report confirms "in situ" status; if invasion is noted, a C67.- code is appropriate.
• This code is often a primary diagnosis when the patient is undergoing treatment or surveillance specifically for CIS.