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Helicobacter pylori IgG Antibody, Serum

Published: August 9, 2026Updated: August 16, 2026

This test measures antibodies to *Helicobacter pylori*, a bacteria often linked to stomach issues like ulcers or inflammation. It helps determine if you’ve ever been exposed to the bacteria.

Quick summary

["This test checks for past exposure to *H. pylori*, which may affect your stomach health."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
109970-4
Short code
H pylori IgG Msmt Ser
Synonyms
H pylori IgG Msmt Ser
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
CPT
82784
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

Why This Test Is Done

Your doctor may recommend this test if you have symptoms like stomach pain, nausea, or unexplained weight loss. It’s also used to confirm if you’ve been treated for *H. pylori* and whether the treatment worked.

What to Expect Before the Test

No special preparation is needed. A blood sample will be taken from a vein in your arm. You may feel a slight pinch, but it usually doesn’t cause discomfort.

What the Results Mean

A positive result means you’ve likely been exposed to *H. pylori* at some point. A negative result suggests no current exposure, but it doesn’t rule out past infection. Follow-up tests may be needed if symptoms persist.

Common Reasons for Testing

Doctors often use this test to diagnose stomach issues like gastritis, ulcers, or to check if *H. pylori* has returned after treatment.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

H. pylori IgG Antibody

Frequently asked questions

If you have a positive result, your doctor may recommend further testing or treatment to address potential stomach problems.
This test helps guide treatment decisions but isn’t a direct diagnosis of current symptoms. Symptoms like pain or bloating should still be discussed with your doctor.
Can I get this test if I’m pregnant?
Yes, this blood test is generally safe during pregnancy. However, always confirm with your healthcare provider before any tests.
What if my results are positive but I feel fine?
A positive result means past exposure, not necessarily active infection. If you’re asymptomatic, no immediate action is needed unless your doctor recommends further evaluation.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy