Diseases of the stomach or the duodenum, unspecified
General information only. Anpheros does not diagnose and does not recommend treatment. Talk to a doctor or pharmacist about your situation. In an emergency, call 112 (or your local emergency number).
In short
The stomach is an organ located between the esophagus and the small intestine where the digestion of protein begins. The stomach stores swallowed food, mixes it with stomach acids, and sends the mixture to the small intestine. Medical attention should be sought for signs such as blood in a bowel movement, severe abdominal pain, heartburn not relieved by antacids, unintended weight loss, or ongoing vomiting or diarrhea.
Source: MedlinePlus, National Library of Medicine.
AI-generated summary of the sources cited on this page, checked automatically against them. Not reviewed by a clinician; not medical advice.
Codes
Description
Your stomach is an organ between your esophagus and small intestine. It is where digestion of protein begins. The stomach has three tasks. It stores swallowed food. It mixes the food with stomach acids. Then it sends the mixture on to the small intestine.
Most people have a problem with their stomach at one time or another. Indigestion and heartburn are common problems. You can relieve some stomach problems with over-the-counter medicines and lifestyle changes, such as avoiding fatty foods or eating more slowly. Other problems like peptic ulcers or GERD require medical attention.
You should see a doctor if you have any of the following:
- Blood when you have a bowel movement
- Severe abdominal pain
- Heartburn not relieved by antacids
- Unintended weight loss
- Ongoing vomiting or diarrhea
NIH: National Institute of Diabetes and Digestive and Kidney Diseases
Next to it in ICD-10
- K13Other diseases of the lips and lining of the mouth
- K14Tongue diseases
- K21Acid reflux (GERD)
- K31Other stomach and duodenum diseases
- K35Acute appendicitis without localised or generalised peritonitis
- K36Appendicitis, unspecified
Neighbouring codes in the classification, not a medical link.
External resources
Questions
What is the ICD-10 code for Diseases of the stomach or the duodenum, unspecified?
K29 (WHO, International Classification of Diseases, 10th Revision).
What is the ICD-11 code for Diseases of the stomach or the duodenum, unspecified?
DA7Z: Diseases of the stomach or the duodenum, unspecified (WHO, ICD-11 for Mortality and Morbidity Statistics).
Sources and attribution
- ICD-11 for Mortality and Morbidity Statistics, © World Health Organization, licensed under CC BY-ND 3.0 IGO.
- Names other than the official source titles: Anpheros translations and plain-language names, made with AI assistance and checked automatically; the source names are in English.
- Source: MedlinePlus, National Library of Medicine.
- ICD-10 codes and titles © World Health Organization. Source: WHO, International Classification of Diseases, 10th Revision (2019).
Anpheros Search catalog 2026.10.5, published 17 October 2026. About the data →
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Links between terms. "May be associated with" means the link appears in a cited source. It does not mean you have that condition.
In an emergency, call 112 (or your local emergency number). Do not delay seeking medical help because of something you read here.