Endometriosis of the pudendal nerve

This code signifies the presence of endometrial tissue abnormally located on or within the pudendal nerve. This condition can lead to chronic pelvic pain, neuropathic symptoms, and dysfunction in the areas innervated by the pudendal nerve, such as the perineum, external genitalia, and anal region.

Use this code when documentation explicitly states endometriosis affecting the pudendal nerve. This diagnosis is often made based on imaging findings (e.g., MRI) or confirmed during surgical exploration, especially in patients presenting with intractable pudendal neuralgia or chronic pelvic pain.

• Ensure the documentation clearly specifies the pudendal nerve as the affected site, not just general pelvic nerve involvement.
• Consider sequencing this code after a more general endometriosis code (e.g., N80.0-N80.9) if the pudendal nerve involvement is a manifestation of a broader endometriosis diagnosis.
• Distinguish from other causes of pudendal neuralgia, such as nerve entrapment or compression, which would be coded differently.