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K30 – Functional Dyspepsia: Causes & Treatment

K30 is the ICD-10 code for functional dyspepsia, a condition characterized by upper abdominal pain, bloating, and digestive discomfort without an identifiable organic cause.

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Things worth knowing about "K30"

K30 is the ICD-10 code for functional dyspepsia, a condition characterized by upper abdominal pain, bloating, and digestive discomfort without an identifiable organic cause.

What is K30?

The ICD-10 code K30 refers to functional dyspepsia, sometimes called irritable stomach or non-ulcer dyspepsia. It describes recurring or chronic discomfort in the upper abdomen that cannot be explained by a structural or biochemical abnormality. The term “dyspepsia” derives from Greek and broadly means “difficult digestion.”

Causes

The exact cause of functional dyspepsia is not fully understood. Several contributing factors have been identified:

  • Impaired gastric motility: The stomach empties too slowly or in an uncoordinated manner.
  • Increased visceral sensitivity: The digestive tract reacts more strongly to normal stimuli such as pressure or acid.
  • Psychosocial factors: Stress, anxiety, and depression frequently worsen symptoms.
  • Helicobacter pylori infection: A bacterial infection of the stomach lining is found in a subset of patients.
  • Dietary habits: Fatty, spicy, or acidic foods, as well as caffeine and alcohol, can trigger episodes.

Symptoms

Common symptoms associated with K30 (functional dyspepsia) include:

  • Pain or pressure in the upper abdomen (epigastric region)
  • Early satiety (feeling full quickly after eating)
  • Postprandial fullness and bloating
  • Belching and nausea
  • Burning sensation in the stomach area

Diagnosis

K30 is a diagnosis of exclusion. Organic causes such as peptic ulcers, gastroesophageal reflux disease, or stomach cancer must first be ruled out. Diagnostic steps typically include:

  • Medical history and physical examination
  • Gastroscopy (upper endoscopy): To exclude structural abnormalities
  • Helicobacter pylori testing: Urea breath test, stool antigen test, or biopsy
  • Blood tests: To rule out systemic conditions such as celiac disease or thyroid disorders
  • Abdominal ultrasound: To assess the liver, gallbladder, and pancreas

Treatment

Treatment of functional dyspepsia is tailored to the individual and the predominant symptoms.

Lifestyle Modifications

  • Dietary adjustments: smaller, more frequent meals; avoiding trigger foods
  • Stress management and relaxation techniques
  • Avoiding smoking and excessive alcohol consumption

Medication

  • Proton pump inhibitors (PPIs): e.g. omeprazole, effective for acid-related complaints
  • Prokinetics: Promote gastric emptying (e.g. metoclopramide)
  • H2 blockers: Reduce gastric acid secretion
  • Helicobacter pylori eradication: Antibiotic therapy if infection is confirmed
  • Herbal preparations: e.g. STW 5 (Iberogast) – a plant-based remedy with clinically demonstrated efficacy
  • Low-dose antidepressants: Considered when psychological factors contribute significantly

Psychotherapeutic Approaches

Cognitive behavioral therapy or psychosomatic treatment may be beneficial when psychosocial factors play a major role in symptom development and maintenance.

References

  1. Stanghellini V et al. - Gastroduodenal Disorders. Gastroenterology, 2016; 150(6):1380–1392. (Rome IV Criteria)
  2. Moayyedi PM et al. - ACG and CAG Clinical Guideline: Management of Dyspepsia. American Journal of Gastroenterology, 2017; 112(7):988–1013.
  3. Talley NJ, Ford AC - Functional Dyspepsia. New England Journal of Medicine, 2015; 373(19):1853–1863.

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