Deep endometriosis of the left pelvic sidewall

This code signifies the presence of deeply infiltrating endometrial tissue located specifically on the left pelvic sidewall. This condition involves endometrial-like glands and stroma extending more than 5mm beneath the peritoneal surface, causing significant inflammation and potential adhesion formation.

Apply this code when documentation clearly identifies deep endometriosis affecting the left pelvic sidewall, often diagnosed via imaging (e.g., MRI) or confirmed during surgical exploration (e.g., laparoscopy). The physician's operative report or pathology findings should explicitly state the location and depth of the endometrial implants.

• Ensure the documentation specifies "deep" endometriosis and the exact "left pelvic sidewall" location.
• Distinguish from superficial peritoneal endometriosis or endometriosis affecting other pelvic sites.
• Code any associated pain (e.g., chronic pelvic pain) or infertility separately, if documented.