Deep endometriosis of the sigmoid colon

This code signifies the presence of endometrial-like tissue that has infiltrated deeply into the wall of the sigmoid colon. This condition is a form of extragenital endometriosis, specifically affecting the lower part of the large intestine. It can cause significant gastrointestinal symptoms, including pain, bleeding, and bowel dysfunction.

Use this code when diagnostic imaging (e.g., MRI, colonoscopy with biopsy) or surgical findings confirm deep infiltration of endometrial implants into the sigmoid colon. This code is appropriate for patients presenting with symptoms such as cyclical rectal bleeding, dyschezia, or severe pelvic pain associated with bowel movements, where endometriosis of the sigmoid colon has been definitively diagnosed.

• Ensure documentation specifies "deep" involvement of the sigmoid colon, not just superficial implants.
• Distinguish from endometriosis of other bowel segments (e.g., N80.51 for small intestine, N80.53 for rectum).
• Code any associated symptoms (e.g., chronic pelvic pain, dyschezia) separately as secondary diagnoses.