Deep endometriosis of the small intestine

This code signifies the presence of deeply infiltrating endometrial tissue within the wall of the small intestine. This condition involves endometrial-like glands and stroma extending beyond the superficial serosa, causing symptoms such as abdominal pain, bowel dysfunction, and bleeding. It represents a severe form of endometriosis affecting the gastrointestinal tract.

Use this code when documentation confirms deep endometriosis specifically involving the small intestine. This diagnosis is typically supported by imaging studies (e.g., MRI, CT) demonstrating bowel wall involvement, endoscopic findings, or histological confirmation from biopsy or surgical excision. It applies to cases where the depth of infiltration is significant.

• Differentiate from superficial endometriosis of the small intestine (N80.50) or other pelvic organs.
• Ensure documentation specifies "deep" involvement and the exact anatomical site (small intestine).
• Consider sequencing with codes for associated symptoms (e.g., abdominal pain, intestinal obstruction) if they are not integral to the endometriosis itself.