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Serum/Plasma Gastric Pepsinogen I

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

This test measures the level of pepsinogen I, a digestive enzyme produced by the stomach lining. It helps assess stomach acid production and may indicate early signs of gastric damage or conditions like gastritis or stomach cancer.

Quick summary

["Pepsinogen I helps detect stomach issues early by monitoring enzyme levels linked to acid production and tissue health."]

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

Key facts at a glance

LOINC
24339-4
Short code
Gas Pnl BldV
Synonyms
Gas Pnl BldV
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
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

What Is Pepsinogen I Used For?

Pepsinogen I is primarily used to evaluate stomach health, especially in diagnosing conditions like chronic gastritis or early-stage gastric cancer. It can also help assess whether stomach acid production is normal or reduced.

How Is This Test Performed?

A blood sample is drawn from a vein, usually in your arm. The blood is then sent to a lab for analysis to measure pepsinogen I levels. No special preparation is typically required, but you may be asked to avoid certain medications or foods for a few days before testing.

Why Might You Need This Test?

Your healthcare provider may recommend this test if you have symptoms like stomach pain, nausea, vomiting, or unexplained weight loss. It may also be used in screening or monitoring for conditions affecting stomach function or cancer risk.

What Do Results Mean?

Higher-than-normal levels might suggest reduced stomach acid production (hypochlorhydria), while lower levels could indicate inflammation, infection, or early stomach cancer. Results are interpreted by a medical professional based on your full medical history and symptoms.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Pepsinogen I (Serum/Plasma)

Frequently asked questions

What causes abnormal pepsinogen I levels?
Abnormal pepsinogen I levels can result from conditions like chronic gastritis, Helicobacter pylori infection, stomach ulcers, or certain medications that affect stomach acid. It may also be influenced by lifestyle factors like smoking or heavy alcohol use.
How soon will I get my results?
Results are typically available within 1 to 3 business days, depending on lab processing times. Your healthcare provider will discuss the findings with you during your follow-up visit.
Can I prepare for this test?
Generally, no special preparation is needed, but avoid taking certain medications (like proton pump inhibitors) or consuming large amounts of alcohol or spicy foods for a few days before testing if instructed by your doctor.
  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