Deep endometriosis of left ureter

This code signifies the presence of deeply infiltrating endometrial tissue within the wall of the left ureter. This condition can lead to ureteral obstruction, hydronephrosis, and renal dysfunction due to the inflammatory and fibrotic response induced by the ectopic endometrial implants.

Apply this code when documentation explicitly states deep endometriosis affecting the left ureter, often identified during surgical exploration, imaging studies (e.g., MRI, CT), or ureteroscopy. It is appropriate for cases where the endometrial implants have penetrated beyond the superficial layers of the ureteral wall.

• Ensure documentation specifies "deep" involvement and laterality (left ureter) to differentiate from superficial or unspecified endometriosis.
• Code any associated complications, such as hydronephrosis (N13.30-N13.39), separately.
• Do not confuse with endometriosis of other pelvic organs; laterality and specific organ involvement are crucial for accurate coding.