ICD-10 Code K31.A2 – Gastric intestinal metaplasia with dysplasia (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K31.A2 – Gastric intestinal metaplasia with dysplasia
What it is
K31.A2 identifies gastric intestinal metaplasia with dysplasia, meaning the stomach lining has changed to an intestinal-type pattern and also shows dysplastic, precancerous cellular changes.
Clinical signs
Findings are usually based on endoscopic biopsy rather than symptoms alone. Clinical features vary; refer to documentation for pathology confirming intestinal metaplasia with dysplasia.
When to use this code
Use this code when the pathology report explicitly documents gastric intestinal metaplasia with dysplasia. It may be appropriate after upper endoscopy with biopsy when the diagnosis is confirmed by histology. If the report says metaplasia without dysplasia, do not use this code.
Do not use for
Do not use for gastric intestinal metaplasia without dysplasia or for nonspecific gastritis alone. Check documentation if the biopsy wording is unclear or if dysplasia is not confirmed.
Coding tip
Code from the pathology wording, and verify whether dysplasia is present before assigning K31.A2.