Carcinoma in situ of other urinary organs

This code signifies the presence of carcinoma in situ within urinary organs other than the bladder, prostate, or urethra. Carcinoma in situ represents a pre-invasive, high-grade epithelial lesion where malignant cells are confined to the epithelial layer and have not invaded the basement membrane.

Apply this code when documentation specifies carcinoma in situ of the ureter, renal pelvis, or other specified urinary organ. This diagnosis is typically confirmed by biopsy and subsequent histopathological examination.

• Ensure the documentation explicitly states "in situ" and specifies a urinary organ other than the bladder, prostate, or urethra.
• Do not use this code for invasive carcinoma or for carcinoma in situ of the bladder (D00.00-D00.02), prostate (D07.5), or urethra (D07.60-D07.61).
• Sequence this code as the primary diagnosis when it is the reason for the encounter, such as for surveillance or treatment of the carcinoma in situ.