Deep endometriosis of unspecified ureter

This code signifies the presence of deep infiltrating endometriosis affecting an unspecified ureter. This condition involves endometrial-like tissue growing more than 5mm beneath the peritoneal surface, specifically within the wall of the ureter, potentially causing obstruction or hydronephrosis.

Use this code when documentation confirms deep endometriosis involving a ureter, but the specific left or right ureter is not identified. This diagnosis is typically made through imaging (e.g., MRI, CT) or surgical exploration with biopsy.

• Ensure documentation specifies "deep" endometriosis and involvement of the ureter.
• Avoid using this code if the laterality of the affected ureter (left or right) is clearly documented; instead, use the more specific codes N80.A51 or N80.A52.
• Consider additional codes for associated conditions such as hydronephrosis (N13.30-N13.39) or ureteral obstruction (N13.8).