Superficial endometriosis of the sigmoid colon

This code signifies the presence of endometrial-like tissue on the superficial surface of the sigmoid colon. This ectopic tissue responds to hormonal fluctuations, leading to symptoms such as abdominal pain, bowel dysfunction, and dyschezia, particularly during menstruation. It represents a localized form of endometriosis affecting a specific segment of the large intestine.

Use this code when documentation explicitly states superficial endometriosis involving the sigmoid colon. This diagnosis is typically confirmed through laparoscopic visualization and biopsy. It is appropriate for patients presenting with symptoms referable to the lower gastrointestinal tract in the context of a known or suspected endometriosis diagnosis.

• Ensure documentation specifies "superficial" involvement of the sigmoid colon; deeper infiltration would require a different code.
• Always sequence this code after the primary diagnosis if the endometriosis is a manifestation of a more generalized condition.
• Distinguish from other intestinal endometriosis codes (e.g., N80.50, N80.51, N80.53) based on the specific anatomical site and depth of involvement.