The short answer
H. pylori Stool Antigen Test measures H. pylori Antigen (EIA, Stool) from a stool sample. At TestWell it costs $149.99 plus a $6 lab fee, needs no fasting, and results post in 3–5 business days. Physician-authorized with no doctor's visit or insurance needed; draw at Quest.
TestWell Price
$149.99
+ $6 lab processing fee
This stool antigen test detects Helicobacter pylori (H. pylori), the bacterium responsible for most stomach ulcers and chronic gastritis. Unlike the breath test, this version uses an enzyme immunoassay (EIA) on a stool sample, making it a convenient alternative when a breath test is not feasible. It is highly accurate for both initial diagnosis and confirming successful eradication after antibiotic treatment. H. pylori infects roughly half the world's population, though many carriers are asymptomatic. Testing is recommended for patients with persistent stomach pain, bloating, nausea, or a history of ulcers.
Detects active Helicobacter pylori infection by identifying H. pylori antigen in a stool sample — a leading cause of peptic ulcers and chronic gastritis. Also used to confirm the infection has cleared after treatment.
People with persistent indigestion, stomach pain, bloating, or known/suspected peptic ulcers or gastritis; and anyone confirming that H. pylori has been eradicated after a course of treatment.
Sample Type
Stool sample
Fasting
Not required
Results In
3–5 business days
Performed At
Quest
1 biomarker tested
Your H. pylori Stool Antigen Test results will include values for each of the 1 biomarker tested, along with reference ranges. Results are reviewed by a licensed physician before being released to your secure portal.
If any values fall outside the normal range, your report will include guidance on what that may mean and recommended next steps. You'll receive an email notification when your results are ready, typically within 3–5 business days.
Typical reference range layout
Lab reports show where your value sits relative to established reference intervals—your physician interprets this in context for you.
No fasting required. Discontinue proton pump inhibitors (PPIs) and antibiotics at least 2 weeks before testing for accurate results — consult your provider before stopping any medications.
The short answer
Worth it when the question is 'do I have an active H. pylori infection right now?' — persistent indigestion, gnawing stomach pain, or a known ulcer — and when confirming the infection actually cleared after treatment. The stool antigen test detects active infection, which blood antibody tests cannot do.
We would rather you order the right test than the most expensive one.
This is a stool test, not a blood draw, so mobile phlebotomy does not apply. You collect a small sample with the provided kit and return it to a Quest location. The analysis is the same stool antigen immunoassay a GI clinic would order - $149.99 self-pay on TestWell versus roughly $500 hospital-billed.
An at-home draw is not recommended for this test — it needs a lab-based collection to be accurate.
The markers that matter most and what an out-of-range value can mean. Reference ranges vary by lab, age and sex.
| Marker | Typical range | What it means |
|---|---|---|
| H. pylori stool antigen | Negative = no active infection detected | A negative result means no H. pylori antigen was found - either you were never infected or a treated infection has cleared (assuming you respected the PPI/antibiotic washout). A positive result means an active infection; treatment is a provider conversation, typically a short course of combination therapy, followed by a repeat stool antigen at least 4 weeks after finishing to confirm eradication. |
This section medically reviewed by Youmna DiStefano, MD — updated July 2026. General health information, not medical advice; interpret results with a qualified clinician.
A H. pylori Stool Antigen Test test costs $149.99 at TestWell — $155.99 all-in when ordered alone, because the $6 lab processing fee is charged once per order, with no draw fee or physician fee added. Hospital outpatient labs typically bill around $500.00 self-pay for the same test, and often more. With insurance, what you pay depends on your deductible and your plan's negotiated rate; TestWell's price is fixed before the draw and is HSA/FSA-eligible.
| Where you order | Price | One test, all-in | Notes |
|---|---|---|---|
| TestWell (drawn at Quest or Labcorp) | $149.99 | $155.99 | Includes the one $6 lab processing fee, charged once per order |
| Hospital outpatient lab, self-pay (typical) | $500.00 | $500.00 | Reference figure; hospital charges vary widely by facility and are often higher |
Lab test codes: Quest test code 34838. Competitor prices are read from the linked public pages and re-checked regularly; the labs' sites may add taxes or change prices without notice.
Compare more: Quest Diagnostics price list · Labcorp price list · Quest vs Labcorp · Lab test price checker
Medically reviewed by Youmna DiStefano, MD · Last reviewed September 2026
TestWell Price
$149.99
+ $6 lab processing fee at checkout
No insurance needed · HIPAA compliant
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H. pylori Stool Antigen Test
$149.99