Malignant neoplasm of pylorus

This code signifies a cancerous tumor originating in the pylorus, the muscular valve that connects the stomach to the duodenum. This malignancy is a type of gastric cancer specifically located at the distal end of the stomach.

Apply this code when documentation confirms a primary malignant neoplasm of the pylorus, typically identified through biopsy and imaging studies. This diagnosis is often made following endoscopic examination and histopathological confirmation.

• Ensure documentation specifies "pylorus" as the exact site; avoid using for other gastric regions.
• Code any associated metastases separately based on their anatomical location.
• Review pathology reports for definitive confirmation of malignancy and site.