Endometriosis of lung

This code represents the presence of endometrial-like tissue growing outside the uterus, specifically within the lung parenchyma or pleura. This ectopic tissue can cause symptoms such as hemoptysis, dyspnea, and catamenial pneumothorax, often correlating with the menstrual cycle.

Use this code when documentation confirms the diagnosis of endometriosis affecting the lung. This typically involves imaging findings (e.g., CT scan showing nodules or cysts) and/or biopsy confirming endometrial glands and stroma within lung tissue. It is often seen in patients with a history of pelvic endometriosis.

• Ensure documentation clearly specifies the lung as the affected site of endometriosis.
• Differentiate from other lung pathologies that may present with similar symptoms, such as primary lung tumors or metastatic disease.
• Consider sequencing this code after a code for pelvic endometriosis (N80.0-N80.9) if both conditions are present and treated.