Endometriosis of pelvic peritoneum

This code signifies the presence of endometrial tissue outside the uterus, specifically located on the pelvic peritoneum. This ectopic tissue responds to hormonal changes, leading to inflammation, pain, and potential adhesion formation within the pelvic cavity.

Apply this code when documentation clearly states endometriosis affecting the pelvic peritoneum. This is often diagnosed via laparoscopy with biopsy, or strongly suspected based on imaging and clinical symptoms such like chronic pelvic pain, dyspareunia, or infertility, with the peritoneum specified as the affected site.

• Ensure the documentation specifies "pelvic peritoneum" as the site of endometriosis; avoid using for other specified or unspecified sites.
• Consider sequencing this code after a code for infertility (628.x) if endometriosis is identified as the underlying cause.
• Distinguish from endometriosis of the ovary (617.1) or uterus (adenomyosis, 617.0).