ICD-10 Code K28 – Gastrojejunal ulcer (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code K28 – Gastrojejunal ulcer
What it is
K28 identifies an ulcer at the gastrojejunal anastomosis, where the stomach connects to the jejunum. Use it when documentation specifically states a gastrojejunal or marginal ulcer.
Clinical signs
Patients may have epigastric pain, nausea, vomiting, bleeding, or anemia. Clinical features vary; refer to documentation and endoscopic findings when available.
When to use this code
Use K28 when the provider documents a gastrojejunal ulcer after gastric surgery or bypass. It also fits postoperative marginal ulcer language, if the record clearly links the ulcer to the gastrojejunal site.
Do not use for
Do not use K28 for ordinary gastric, duodenal, or peptic ulcers without a gastrojejunal location. Check documentation if the site or postoperative relationship is unclear.
Coding tip
Confirm the exact ulcer location and whether the note describes a postoperative gastrojejunal anastomotic ulcer.