K26.9 — Duodenal ulcer, unspecified as acute or chronic, without hemorrhage or perforation

K26.9

ICD-10 Chapter 11: Digestive System — illustrative image — Chapter 11: Diseases of the digestive system (K00–K95) — illustrative image

What this code means

A duodenal ulcer is an open sore in the first part of the small intestine, often linked to H. pylori or anti-inflammatory medicines.

Also called: duodenal ulcer.

When this code is used

Used for duodenal ulcer, unspecified as acute or chronic, without haemorrhage or perforation.

Where it sits in ICD-10-CM

Code K26.9 belongs to Chapter 11: Diseases of the digestive system, which covers codes K00–K95 in the FY2027 ICD-10-CM tabular list. The official description above is copied verbatim from the CDC/NCHS FY2027 code file.

Related symptoms

Abdominal pain

Watch: related videos

▶ WatchLaparoscopic duodenal ulcer perforation repair 2 ▶ WatchBleeding from duodenal ulcer ▶ WatchDuodenal ulcer

Frequently asked questions

What is ICD-10-CM code K26.9?

K26.9 is the ICD-10-CM diagnosis code for “Duodenal ulcer, unspecified as acute or chronic, without hemorrhage or perforation”. A duodenal ulcer is an open sore in the first part of the small intestine, often linked to H. pylori or anti-inflammatory medicines.

When is code K26.9 used?

Used for duodenal ulcer, unspecified as acute or chronic, without haemorrhage or perforation. It belongs to Chapter 11 of ICD-10-CM (Diseases of the digestive system).

This guide explains ICD-10-CM codes in plain language for patients, students and other readers. It is educational information only — not coding, billing or medical advice. The code recorded for any real encounter is assigned from the full clinical documentation by the treating team and qualified coders, and only they can decide which code fits a specific case.