ICD-10 Code K31.A22 – Gastric intestinal metaplasia with high grade dysplasia (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K31.A22 – Gastric intestinal metaplasia with high grade dysplasia
What it is
K31.A22 identifies gastric intestinal metaplasia with high grade dysplasia. Use it when stomach lining changes are documented as having a high-risk precancerous pattern.
Clinical signs
Findings usually come from endoscopy and biopsy, not symptoms alone. Clinical features vary; refer to documentation for intestinal metaplasia and the presence of high grade dysplasia.
When to use this code
Use this code when the provider documents gastric intestinal metaplasia with high grade dysplasia in the stomach. It may appear on pathology reports or specialist notes confirming the diagnosis. If the record only states intestinal metaplasia or low grade dysplasia, this code is not appropriate.
Do not use for
Do not use it for gastric intestinal metaplasia without dysplasia, or for low grade dysplasia. Check documentation if the pathology wording is unclear or if the lesion is described only as suspicious.
Coding tip
Code from the most specific pathology wording available, and verify that “high grade dysplasia” is explicitly documented before assigning K31.A22.