Endometriosis of ant abd wall, fascia and muscular layers

This code describes the presence of endometrial tissue abnormally located within the anterior abdominal wall, specifically affecting the fascial and muscular layers. This ectopic endometrial tissue can cause localized pain, swelling, and cyclical symptoms correlating with the menstrual cycle. It often presents as a palpable mass or nodule.

Use this code when documentation clearly indicates endometriosis identified within the rectus abdominis muscle, fascia, or other anterior abdominal wall musculature. This is frequently seen following abdominal surgeries, such as C-sections or hysterectomies, where endometrial cells may have been inadvertently implanted. Confirmation via biopsy or imaging (e.g., MRI) is ideal.

• Differentiate from subcutaneous endometriosis (N80.C10) or skin endometriosis (N80.C12).
• Ensure the documentation specifies involvement of the fascia and muscular layers of the anterior abdominal wall.
• Consider sequencing this code after a code for the primary reason for the encounter, if the endometriosis is a secondary finding or complication.