Deep endometriosis of the uterus

This diagnosis code signifies the presence of endometrial-like tissue that has infiltrated deeply into the myometrium of the uterus. This deep infiltration can cause significant pain, abnormal uterine bleeding, and infertility. It represents a more severe form of adenomyosis or deeply invasive endometriosis affecting the uterine wall.

Assign this code when documentation explicitly states "deep endometriosis of the uterus" or "deep adenomyosis." It is appropriate for cases where imaging (e.g., MRI, transvaginal ultrasound) or surgical pathology confirms deep myometrial involvement by endometrial implants. Supporting documentation should clearly indicate the depth of invasion into the uterine wall.

• Differentiate from superficial endometriosis of the uterus (N80.00) or adenomyosis (N80.01) based on documented depth of invasion.
• Ensure the documentation specifies the uterus as the affected organ; endometriosis in other pelvic sites would use different N80 subcategories.
• Always review operative reports and pathology findings for definitive confirmation of deep myometrial involvement.