Neoplasm of uncertain behavior of stomach, intestines, and rectum

This code signifies the presence of a tumor in the stomach, intestines, or rectum whose biological behavior cannot be definitively classified as benign or malignant based on current diagnostic information. These neoplasms exhibit features that are atypical but do not meet the criteria for malignancy, requiring further investigation or monitoring.

Use this code when pathology reports or clinical documentation describe a gastrointestinal lesion as "uncertain behavior," "borderline malignancy," or "indeterminate." This applies when a definitive diagnosis of benign or malignant cannot be established, often following biopsy or imaging, and the physician indicates the need for further evaluation.

• Do not use this code if a definitive diagnosis of benign or malignant is established; instead, code to the specific benign or malignant neoplasm.
• Always review the pathology report carefully for the most precise diagnosis; "uncertain" or "indeterminate" are key indicators for this code.
• Consider sequencing this code as the primary diagnosis when the neoplasm of uncertain behavior is the reason for the encounter or admission.