Gastric intestinal metaplasia with high grade dysplasia

This code signifies a precancerous condition where the normal lining of the stomach has transformed into cells resembling those found in the intestine, and these abnormal cells show severe architectural and cytological changes, indicating a high risk of progression to adenocarcinoma. It represents a significant stage of gastric premalignancy requiring close surveillance and potential intervention.

Assign this code when pathology reports confirm the presence of intestinal metaplasia within the gastric mucosa, specifically noting high-grade dysplasia. Documentation must clearly specify "high-grade" to differentiate it from low-grade or unspecified dysplasia. This diagnosis is typically made following endoscopic biopsy.

• Ensure the pathology report explicitly states "high-grade dysplasia" for gastric intestinal metaplasia.
• Do not use this code for low-grade dysplasia or intestinal metaplasia without specified dysplasia.
• Consider sequencing this code as a primary diagnosis when it is the reason for the encounter, such as for surveillance or treatment planning.