Endometriosis of the inguinal canal

This code represents the presence of endometrial tissue abnormally located within the inguinal canal. This ectopic tissue can cause symptoms such as pain, swelling, or a palpable mass in the groin region, often exacerbated during menstruation. It is a rare manifestation of endometriosis.

Use this code when documentation explicitly states endometriosis affecting the inguinal canal. This diagnosis is typically confirmed through imaging studies (e.g., ultrasound, MRI) or surgical biopsy revealing endometrial glands and stroma in the inguinal region. It is appropriate for both primary diagnosis and secondary conditions.

• Ensure documentation clearly specifies the inguinal canal as the site of endometriosis, not just general pelvic endometriosis with groin pain.
• Consider co-reporting with codes for associated symptoms like chronic pain (e.g., R10.2) if documented and treated.
• Differentiate from other inguinal masses such as hernias (K40-K46) or lymphadenopathy (R59.-) unless endometriosis is specifically identified as the underlying cause.