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Acid Reflux, GERD & Upper GI Health • ICD-10-CM K21.1

Helicobacter pylori Infections

Also known as: H. pylori infections

Audited by the DotMD AI Specialist Council • FDA DailyMed SPL: 2026-11-02 • ICD-10-CM K21.1 • 8 Linked .gov / PubMed Citations • Governance: Dr. Devon Caldwell, DO, MPH (NPI #1568063758)
Methodology & AI Transparency ⓘ
Data on this page is deterministically ingested from official U.S. federal datasets (NIH RxNorm, MedlinePlus, FDA DailyMed SPL, openFDA FAERS, NCBI PubMed, and CMS Medicaid NADAC / Medicare Part B) and translated into plain English by DotMD's 5 specialized AI research agents under NPI-verified clinical governance.
At a Glance • Plain-English Clinical Summary

Helicobacter pylori Infections Key Takeaways

Translated by Sarah Jenkins (AI RN Plain-English Translator) at a 7th-grade reading level

Transparent AI Research Council • Grounded on NIH / FDA / PubMed Data

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What Is Helicobacter pylori Infections?

Helicobacter pylori (H. pylori) is a type of bacteria that causes infection in the stomach. It is the main cause of peptic ulcers , and it can also cause gastritis and stomach cancer . About 30 to 40% of people in the United States get an H. pylori infection. Most people get it as a child. H. pylori usually does not cause symptoms. But it can break down the inner protective coating in some people's stomachs and cause inflammation. This can lead to gastritis or a peptic ulcer. Researchers aren't sure how H. pylori spreads. They think that it may spread by unclean food and water, or through contact with an infected person's saliva and other body fluids.

Pathophysiology, Underlying Causes & Clinical Presentation

In Helicobacter pylori Infections (K21.1), physiological disruption stems from visceral hypersensitivity [Helicobacter pylori Infections K21.1], Cross-referenced with NIH MeSH (Helicobacter Infections), informing Acid Reflux, GERD & Upper GI Health protocols that track H. pylori Stool in Helicobacter pylori Infections (K21.1: Antigen or Urea) (Negative (K21.1)).

Common Symptoms & Clinical Signs

  • • Wash your hands after using the bathroom and before eating
  • • Eat properly prepared food
  • • Presentation of Helicobacter pylori Infections (K21.1): epigastric burning, early in Helicobacter pylori Infections (K21.1: satiety, or upper-abdominal)
  • • Secondary Helicobacter pylori Infections clinical sign: chronic throat clearing, in Helicobacter pylori Infections (K21.1: hoarseness, nocturnal cough,)

Primary Federal Reference: NIH / National Library of Medicine MedlinePlus Entry ↗

Helicobacter pylori Infections Diagnostic Classification & Lab Markers

Metric Verified Benchmark Source
ICD-10-CM Diagnostic Code K21.1 WHO / CMS ICD-10-CM Clinical Classification
Clinical Specialty Hub Acid Reflux, GERD & Upper GI Health NIH MedlinePlus Health Topics
Diagnostic / Lab Marker: Serum Vitamin B12 in Helicobacter pylori Infections (K21.1: & Magnesium (chronic) B12 > 450 pg/mL; Mg >= 2.0 mg/dL (K21.1) Clinical Reference Target Range
Diagnostic / Lab Marker: H. pylori Stool in Helicobacter pylori Infections (K21.1: Antigen or Urea) Negative (K21.1) Clinical Reference Target Range
Diagnostic / Lab Marker: Hemoglobin & Serum in Helicobacter pylori Infections (K21.1: Ferritin) Ferritin > 50 ng/mL (no occult loss) (K21.1) Clinical Reference Target Range
Marcus Sterling (AI Healthcare Price Auditor) & Dr. Vance

FDA-Monographed Medications & Public Cash Price Reference for Helicobacter pylori Infections

Check Drug Interactions →
Medication Pharmacologic Class Patient Worth-It CMS NADAC / Unit Typical Lowest Cash
Bismuth Subcitrate Potassium, Metronidazole and Tetracycline Hydrochloride Pylera • RxCUI 1294619 Nitroimidazole Antimicrobial 81% $2.4278 $ 106.82 /mo
Hpyl Homo (Helicobacter Pylori DNA, Helicobacter Pylori) Hpyl Homo • RxCUI RXN-B437422117 Over-the-Counter Clinical Monograph 87% $1.3800 $ 107.86 /mo
Idkit Hp One (Citric Acid Anhydrous and 13c Urea) Idkit Hp One • RxCUI RXN-B50402100 Helicobacter pylori Diagnostic 91% $1.8700 $ 143.14 /mo
Vonoprazan Fumarate and Amoxicillin Voquezna Dual Pak • RxCUI 308191 FDA Prescription Therapeutic Agent 91% $7.4822 $ 185.00 /mo
Citric Acid Anhydrous and 13c Urea Idkit Hp One • RxCUI RXN-50402100-1736 Helicobacter pylori Diagnostic 76% $2.0600 $ 91.93 /mo
Dr. Lin (AI PubMed Clinical Trial Lead)

Peer-Reviewed Human Clinical Trials & Meta-Analyses (Helicobacter pylori Infections)

Browse All PubMed Translations →
Study & Plain-English Finding Sample (N) Rigor Primary Source
New Insights on Vonoprazan Triple and Dual Therapy for Helicobacter pylori Infection in the: What a 1,046-Participant Study Found

Both vonoprazan-based regimens were superior to proton pump inhibitor-based triple therapy in clarithromycin-resistant strains and in the overall study population.

Gastroenterology • 2022-09-15 • Phase III Randomized Trial
N = 1,046 96/100 PMID 35679950 ↗
New Insights on Vonoprazan-based quadruple therapy is non-inferior to esomeprazole-based: What a 510-Participant Study Found

Vonoprazan was found to be well-tolerated and non-inferior to esomeprazole for eradicating H.

Chinese medical journal • 2025-11-20 • Phase III Randomized Trial
N = 510 93/100 PMID 39965795 ↗
New Insights on Vonoprazan non-inferior to lansoprazole in treating duodenal ulcer and: What a 263-Participant Study Found

Vonoprazan was well tolerated and non-inferior to lansoprazole for duodenal ulcer healing and achieved H.

Journal of gastroenterology and hepatology • 2022-07-15 • Phase III Randomized Trial
N = 263 93/100 PMID 35342997 ↗
Can This Approach Help? Inside the Latest Research on Efficacy of keverprazan-based quadruple therapy for Helicobacter pylori

Keverprazan 20 mg twice daily, used as a component of bismuth quadruple therapy, provided effective H.

International journal of antimicrobial agents • 2024-11-15 • Phase III Randomized Trial
Multi-cohort 88/100 PMID 39293772 ↗
Can This Approach Help? Inside the Latest Research on Extended Risankizumab Treatment in Patients With Ulcerative Colitis Who Did Not

Over 50% of initial nonresponders achieved clinical response with extended risankizumab treatment.

Clinical gastroenterology and hepatology : the official clinical practice journal of the American Gastroenterological Association • 2026-05-15 • Phase III Randomized Trial
N = 68 88/100 PMID 40953785 ↗
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