Deep endometriosis of the uterosacral ligament(s), unsp side

This code signifies the presence of deep infiltrating endometriosis specifically affecting the uterosacral ligaments, without specifying whether it's on the left or right side. Deep endometriosis is characterized by endometrial-like tissue infiltrating more than 5mm beneath the peritoneal surface.

Use this code when diagnostic imaging (e.g., MRI, transvaginal ultrasound) or surgical findings confirm deep endometriosis involving the uterosacral ligaments, but the specific laterality (left or right) is not documented. It is appropriate when the provider explicitly states "deep endometriosis of the uterosacral ligament(s), unspecified side."

• Ensure documentation clearly specifies "deep" endometriosis and involvement of the uterosacral ligaments.
• If laterality is documented (left or right), use the more specific codes N80.3B1 or N80.3B2.
• Do not use this code for superficial peritoneal endometriosis or endometriosis affecting other pelvic sites.