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K29.8 Duodenitis – ICD-10 Code Explained
K29.8 is the ICD-10 code for duodenitis, an inflammation of the lining of the duodenum. It causes upper abdominal pain and may be associated with gastric irritation.
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K29.8 is the ICD-10 code for duodenitis, an inflammation of the lining of the duodenum. It causes upper abdominal pain and may be associated with gastric irritation.
What does ICD-10 Code K29.8 mean?
The ICD-10 code K29.8 refers to duodenitis – an inflammation of the mucosal lining of the duodenum, which is the first section of the small intestine, located directly after the stomach. In some cases, the condition is diagnosed as gastroduodenitis when both the stomach and the duodenum are simultaneously inflamed.
Causes
Duodenitis can be triggered by several factors:
- Helicobacter pylori infection: The most common bacterial cause of gastrointestinal inflammation.
- Non-steroidal anti-inflammatory drugs (NSAIDs): Medications such as ibuprofen or diclofenac can irritate and damage the mucosal lining.
- Excessive alcohol and caffeine consumption: These substances can chronically irritate the mucosa.
- Stress: Psychological and physical stress can weaken the protective function of the gut lining.
- Increased acid production: As seen in conditions such as Zollinger-Ellison syndrome.
- Crohn's disease: A chronic inflammatory bowel disease that can also affect the duodenum.
Symptoms
The symptoms of duodenitis can vary and often resemble those of a peptic ulcer:
- Pain or burning sensation in the upper abdomen, often when fasting or at night
- Nausea and occasional vomiting
- Bloating and a feeling of fullness
- Loss of appetite
- Acid reflux and heartburn
- In severe cases: dark, tarry stools (indicating gastrointestinal bleeding)
Diagnosis
Gastroscopy (upper endoscopy) is the primary diagnostic tool, allowing direct visualization of the duodenal mucosa and collection of a biopsy for histological analysis. A Helicobacter pylori test is also routinely performed, as this bacterium is a frequent contributing cause.
Treatment
Treatment depends on the underlying cause:
- Helicobacter pylori eradication: A combination of antibiotics and a proton pump inhibitor (PPI) to eliminate the infection.
- Proton pump inhibitors (PPIs): Medications such as omeprazole or pantoprazole reduce stomach acid production and support mucosal healing.
- Discontinuation of causative medications: If NSAIDs are involved, they should be stopped if possible or accompanied by gastroprotective agents.
- Dietary adjustments: Avoiding alcohol, caffeine, fatty foods, and spicy meals.
- Stress management: Relaxation techniques can help reduce symptoms.
Prognosis
Acute duodenitis usually resolves completely with appropriate treatment. Chronic duodenitis requires long-term management and regular monitoring, as untreated inflammation increases the risk of developing peptic or duodenal ulcers.
References
- World Health Organization (WHO): International Classification of Diseases, 10th Revision (ICD-10), Chapter XI – Diseases of the Digestive System, K29.8. Geneva, 2019.
- Longo DL et al. (eds.): Harrison's Principles of Internal Medicine, 20th edition. McGraw-Hill Education, 2018.
- Malfertheiner P et al.: Management of Helicobacter pylori infection – the Maastricht V/Florence Consensus Report. Gut, 2017;66(1):6–30.
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