Neoplasm of uncertain behavior of stomach

This code signifies a gastric lesion that exhibits features making it impossible to definitively classify as benign or malignant based on current pathological examination. It indicates an abnormal growth within the stomach where the biological behavior (e.g., potential for metastasis or aggressive local invasion) is still undetermined.

Use this code when pathology reports describe a gastric neoplasm as "uncertain behavior," "borderline malignancy," or "indeterminate." This is typically assigned after an initial biopsy or surgical excision when further diagnostic workup is pending or inconclusive.

• Do not use this code if the pathology definitively states benign or malignant; use the appropriate CPT code for benign or malignant neoplasms.
• Ensure the documentation explicitly uses terms like "uncertain behavior," "borderline," or "indeterminate" regarding the neoplasm's nature.
• Sequence this code as the primary diagnosis when the uncertain behavior of the gastric neoplasm is the reason for the encounter or admission.