Endometriosis of uterus

This code describes the presence of endometrial tissue growing outside the uterine cavity but specifically within the muscular wall of the uterus itself, a condition known as adenomyosis. This ectopic tissue responds to hormonal changes, leading to symptoms such as heavy menstrual bleeding, severe cramping, and pelvic pain.

Use this code when documentation clearly indicates a diagnosis of adenomyosis or endometriosis confined to the uterus. Supporting documentation typically includes pathology reports confirming endometrial glands and stroma within the myometrium, or imaging findings (e.g., MRI, ultrasound) consistent with adenomyosis.

• Differentiate from endometriosis of other pelvic sites (e.g., ovaries, fallopian tubes), which are coded elsewhere.
• Do not use for general endometriosis without specific mention of uterine involvement.
• Consider sequencing with codes for associated symptoms like menorrhagia (626.2) or dysmenorrhea (625.3) if documented and treated.