Malignant neoplasm of stomach, unspecified

This code represents a cancerous tumor originating in the stomach where the specific anatomical location within the stomach (e.g., cardia, fundus, body, pylorus) has not been documented. It indicates a primary malignancy of the stomach without further site specification.

This code is appropriate when the medical record clearly states a diagnosis of gastric cancer, but the physician's documentation does not specify the subsite. It should be used when the provider explicitly diagnoses "malignant neoplasm of stomach" without additional detail.

• Avoid using this code if a more specific anatomical site within the stomach is documented (e.g., C16.0 for cardia).
• Query the provider for clarification if the documentation indicates gastric cancer but lacks site specificity, to allow for a more precise code assignment.
• Always sequence this code as the primary diagnosis when it is the reason for the encounter, unless another condition is clearly identified as the primary reason.