Days Set Up
Tuesday
Analytic Time

8 hours

MiChart Code
Gastrin
Soft Order Code
RGAST

Test Updated:

Synonyms

RGAST
GASTRIN

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Test Overview

Test Methodology

Chemiluminescent Assay

Test Usage

Diagnosis of Zollinger-Ellison syndrome and pernicious anemia, both of which bear relationship to high gastrin levels, evaluation of patients with severe duodenal ulcer, or recurrent symptoms after gastric surgery, evaluation of achlorhydria.

Reference Range

Fasting: 25-111 pg/ml

* Reference ranges may change over time. Please refer to the original patient report when evaluating results.

Specimen Requirements

Collection Onsite

The patient should stop taking proton pump inhibitors (PPIs) (omeprazole-Prilosec; lansoprazole-Prevacid; rabeprazole-Aciphex; pantoprazole-Protonix; esomeprazole-Nexium, and Zegarid, a rapid release form of omeprazole) ONE WEEK prior to the blood draw. H2-receptor Blockers (i.e. cimetidine) should be stopped THREE DAYS prior to the blood draw. The patient should fast overnight, preferably 12 hrs or more; postprandial specimen should be indicated on the requisition. Collect specimen in an SST tube. Transport specimen to the laboratory on ice immediately after draw, or centrifuge, aliquot serum into a plastic vial and freeze within 1 hour of collection.

Collection Offsite

The patient should stop taking proton pump inhibitors (PPIs) (omeprazole-Prilosec; lansoprazole-Prevacid; rabeprazole-Aciphex; pantoprazole-Protonix; esomeprazole-Nexium, and Zegarid, a rapid release form of omeprazole) ONE WEEK prior to the blood draw. H2-receptor Blockers (i.e. cimetidine) should be stopped THREE DAYS prior to the blood draw. The patient should fast overnight, preferably 12 hrs or more; postprandial specimen should be indicated on the requisition. Collect specimen in SST tube; place on ice immediately after collection. Keep cold until ready to aliquot. Centrifuge, aliquot serum into a plastic vial and freeze within 1 hour of collection.

Yellow Top Tube
Normal Volume
1 mL serum
Minimum Volume
0.5 mL serum

Billing Information

CPT Code
82941
Pro Fee Code
 
LOINC
2333-3

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Our High Standard

Quality that sets us apart

As the reference laboratory division of Michigan Medicine's Department of Pathology, MLabs shares the institution's commitment to applying established quality principles to clinical laboratory testing. Like other large organizations in complex, consequential fields, we rely on an established approach to monitor quality throughout the testing process.