Endometriosis of the small intestine, unspecified depth

This code signifies the presence of endometrial-like tissue within the small intestine, without further specification of how deeply it has infiltrated the intestinal wall. This ectopic tissue can cause symptoms such as abdominal pain, bleeding, and bowel obstruction, particularly during menstruation.

Use this code when documentation confirms endometriosis affecting the small intestine, but the depth of invasion (e.g., superficial, deep) is not specified by the provider. This is appropriate for initial diagnoses or when surgical pathology reports do not detail the extent of intestinal wall involvement.

• Do not use this code if the depth of small intestinal involvement is documented; instead, select a more specific N80.56 subcategory.
• Consider sequencing this code after codes for associated symptoms (e.g., abdominal pain, intestinal obstruction) if they are the primary reason for the encounter.
• Ensure the medical record explicitly states "small intestine" to differentiate from other intestinal sites of endometriosis.