Malignant neoplasm of overlapping sites of pancreas

This code signifies a primary malignant tumor of the pancreas that involves multiple contiguous anatomical sub-sites, making it impossible to assign to a single specific pancreatic region (e.g., head, body, or tail). It indicates the cancerous growth has spread across boundaries within the pancreas itself.

Use this code when documentation clearly states a pancreatic malignancy affects overlapping or contiguous sites, such as "carcinoma involving the head and body of the pancreas" or "tumor extending from the body to the tail." This code is appropriate when the exact origin within the pancreas cannot be precisely localized to one distinct anatomical part.

• Do not use this code if the documentation specifies a single, distinct pancreatic sub-site (e.g., C25.0 for head of pancreas).
• Ensure the physician's documentation explicitly states "overlapping sites" or describes involvement of multiple contiguous pancreatic regions.
• Sequence this code as the primary diagnosis when it represents the main reason for the encounter or treatment.