Endometriosis of the rectum, unspecified depth

This code signifies the presence of endometrial-like tissue growing on or within the rectum, without further specification of how deeply the tissue has infiltrated the rectal wall. This condition can cause symptoms such as painful bowel movements, rectal bleeding, and pelvic pain. It is a form of extragenital endometriosis affecting the gastrointestinal tract.

Use this code when documentation confirms endometriosis involving the rectum, but the depth of invasion (e.g., superficial, deep) is not specified by the provider. This diagnosis is typically made based on imaging studies, colonoscopy with biopsy, or surgical findings. Ensure the medical record clearly indicates rectal involvement.

• Do not use this code if the depth of rectal involvement is documented; instead, select a more specific code from the N80.51 subcategory.
• Consider sequencing this code after a code for generalized endometriosis (e.g., N80.9) if the rectal involvement is a manifestation of a broader disease.
• Always review operative reports and pathology findings for precise anatomical location and depth of infiltration to ensure the most specific code is chosen.