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K29.6 – Chronic Gastritis: Causes and Treatment
K29.6 is the ICD-10 code for chronic gastritis, a long-lasting inflammation of the stomach lining that can have several underlying causes.
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K29.6 is the ICD-10 code for chronic gastritis, a long-lasting inflammation of the stomach lining that can have several underlying causes.
What Does the ICD-10 Code K29.6 Mean?
The code K29.6 belongs to the International Classification of Diseases (ICD-10) and stands for Chronic Gastritis, unspecified. Chronic gastritis refers to a persistent inflammation of the gastric mucosa (stomach lining) that can last for weeks, months, or even years. Unlike acute gastritis, it often presents with mild or non-specific symptoms and may go undiagnosed for a long time.
Causes
Chronic gastritis can be triggered by a variety of factors:
- Helicobacter pylori infection: The most common bacterial pathogen colonizing the stomach lining and causing chronic inflammatory reactions.
- Autoimmune gastritis (Type A): The immune system attacks the parietal cells of the stomach, potentially leading to a deficiency of intrinsic factor and vitamin B12.
- Chemical or toxic causes (Type C): Long-term use of non-steroidal anti-inflammatory drugs (NSAIDs), alcohol abuse, or bile reflux.
- Other causes: Radiation therapy, Crohn’s disease, and rare infectious conditions.
Symptoms
Many patients experience no or only non-specific symptoms. Possible signs include:
- Dull pressure or pain in the upper abdomen
- Nausea and occasional vomiting
- Loss of appetite and early satiety
- Belching and bloating
- In severe cases: weight loss and signs of anemia (particularly in Type A gastritis)
Diagnosis
The diagnosis of chronic gastritis is typically established through:
- Esophago-gastro-duodenoscopy (gastroscopy): Direct visualization of the mucosa and collection of tissue samples (biopsy).
- Histological examination: Microscopic assessment of biopsy specimens for inflammation, atrophy, or Helicobacter pylori.
- Helicobacter pylori testing: Urea breath test, stool antigen test, or serology.
- Blood tests: Assessment of vitamin B12, intrinsic factor antibodies, and parietal cell antibodies when autoimmune gastritis is suspected.
Treatment
Treatment is tailored to the underlying cause:
- Helicobacter pylori eradication: Combination therapy with proton pump inhibitors (PPIs) and two antibiotics (triple therapy) for 7–14 days.
- Discontinuation of harmful substances: Stopping NSAIDs, reducing alcohol and tobacco consumption.
- Acid suppression therapy: Proton pump inhibitors or H2-blockers for symptom relief.
- Vitamin B12 supplementation: Required in autoimmune gastritis with confirmed deficiency, often administered as intramuscular injections.
- Dietary adjustments: Avoiding irritants such as spicy foods, citrus fruits, and carbonated beverages.
Course and Complications
Untreated chronic gastritis can lead to serious complications, including:
- Gastric ulcer (Ulcus ventriculi)
- Gastric mucosal atrophy with reduced acid production
- Intestinal metaplasia as a precancerous change
- Increased risk of gastric cancer in long-standing Helicobacter pylori infection
References
- Malfertheiner P. et al. – Management of Helicobacter pylori infection: the Maastricht V/Florence Consensus Report. Gut, 2017.
- Rugge M. et al. – Gastritis: The clinico-pathological spectrum. Digestive and Liver Disease, 2011.
- World Health Organization (WHO): International Statistical Classification of Diseases and Related Health Problems, 10th Revision (ICD-10), K29.6.
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