ICD-10 Code K29.3 – Chronic Superficial Gastritis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K29.3 – Chronic superficial gastritis
What it is
K29.3 identifies chronic superficial gastritis, a long-lasting inflammation limited to the stomach lining’s surface layer. It describes the diagnosis, not a cause, so you should confirm the documented type and chronicity.
Clinical signs
Clinical features vary; refer to documentation. Commonly recorded findings include persistent epigastric discomfort, nausea, bloating, or dyspepsia, but the code should follow the provider’s documented diagnosis.
When to use this code
Use K29.3 when the record clearly states chronic superficial gastritis. It is appropriate for outpatient visits, follow-up care, or problem lists when the provider documents this specific gastritis type. If the note only says “gastritis” without detail, check documentation.
Do not use for
Do not use K29.3 for acute gastritis, erosive gastritis, or unspecified gastritis unless the provider documents chronic superficial gastritis. Check documentation if the cause or subtype is different.
Coding tip
Code the exact documented gastritis subtype; if the chart is nonspecific, query for clarification before assigning K29.3.