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To view specimen requirements and codes please select your laboratory:
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HELICOBACTER PYLORI AG,EIA,STOOL
Specimen Type STOOL
Specimen State Refrigerated (cold packs)
Patient preparation: For initial diagnostic purposes, no
special patient preparation is required. Patients are not
required to be off of medications or to fast before this
test. While positive test results from patients taking
agents such as proton pump inhibitors and antimicrobials
should be considered accurate, false negative results may
be obtained. For this reason, physicians may suggest the
patient go off medications for two weeks and repeat test if
negative results are obtained.
To confirm eradication, testing should be done at least 4
weeks following the completion of treatment. However, a
positive test result 7 days post therapy is indicative of
This test is cleared for use with specimens from pediatric
Collect 0.5 mL of semi-solid stool or 20 mm diameter solid
stool and transfer to properly labeled sterile, leak-proof
container. Transport refrigerated (cold packs) up to 3 days.
Frozen if delay exceeds 3 days.
Do not place stool in preservative, transport media or swab.
Watery, diarrheal stool is not acceptable.
NOTE: If received frozen, do not thaw.
Room temperature: Unacceptable
Refrigerated: 72 hours
Frozen: 30 days
Watery, diarrheal stool; Stool in preservative, transport
media or swab; Received room temperature.
Plastic screw cap vial
There may be possible false-negative results associated with recent PPI use.
This test is intended to aid in the diagnosis of H.pylori infection and to aid in monitoring the efficacy of antimicrobial therapy. A result of "Detected" indicates H. pylori antigen is present. "Not Detected" indicates the absence of H. pylori antigens or the level of antigen is below the sensitivity of the assay.
Antimicrobials, proton pump inhibitors, and bismuth preparations are known to suppress H. pylori, and ingestion of these prior to H. pylori diagnostic testing may give a false negative result. If clinically indicated, the test may be repeated on a new specimen obtained two weeks after discontinuing treatment.
Colonization with H. pylori is associated with increased risk of patients developing gastritis, peptic ulcer disease, and gastric adenocarcinoma. Stool antigen testing provides a sensitive measure of infection including during and after treatment.
The Result and LOINC information listed below should not be used for electronic interface maintenance with Quest Diagnostics. Please contact the Quest Diagnostics Connectivity Help Desk for more information at 800-697-9302.NOTE: The codes listed in the table below are not orderable Test Codes.
|Result Name||LOINC Code||Component Name|
|Z4540||H.PYLORI AG DETECT,EIA,STOOL||17780-8||Helicobacter pylori Ag|
Reference ranges are provided as general guidance only. To interpret test results use the reference range in the laboratory report.
The CPT codes provided are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payer being billed.
LOINC assignment is based on a combination of test attributes, including the method used by the performing laboratory. For tests not performed by Quest Diagnostics, codes are assigned by the performing laboratory.
* The tests listed by specialist are a select group of tests offered. For a complete list of Quest Diagnostics tests, please refer to our Directory of Services.