Deep endometriosis of the pelvic sidewall, unspecified side

This code signifies the presence of deep infiltrating endometriosis affecting the pelvic sidewall, where endometrial-like tissue has grown significantly into the supporting structures of the pelvis. This condition can cause chronic pelvic pain, dyspareunia, and other debilitating symptoms due to inflammation and fibrosis. The "unspecified side" indicates that the laterality of the affected pelvic sidewall is not documented.

Use this code when documentation confirms deep endometriosis involving the pelvic sidewall, but the medical record does not specify whether it is on the right or left side. This typically occurs following imaging studies (e.g., MRI, transvaginal ultrasound) or surgical findings where the exact laterality was not explicitly recorded. Supporting documentation must clearly state "deep endometriosis" and "pelvic sidewall."

• Avoid using this code if the laterality (right or left) is documented; instead, select the more specific N80.341 or N80.342.
• Ensure the documentation specifies "deep" endometriosis, as superficial endometriosis of the pelvic peritoneum would be coded differently.
• Always review operative reports and imaging interpretations for precise anatomical location and depth of infiltration.