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HelpTest Code GASTRN Gastrin, Serum
Additional Codes
EMR Interface Order Code: 06500
Reporting Name
Gastrin, SUseful For
Investigation of patients with achlorhydria or pernicious anemia
Investigation of patients suspected of having Zollinger-Ellison syndrome
Diagnosis of gastrinoma
Performing Laboratory
Mayo Medical Laboratories in Rochester
Specimen Type
SerumSpecimen Required
Patient Preparation:
1. Fasting (8 hours) required
2. For 12 hours before this test do not take multivitamins or dietary supplements containing biotin (vitamin B7), which is commonly found in hair, skin, and nail supplements and multivitamins.
Collection Container/Tube:
Preferred: Serum gel
Acceptable: Red top
Submission Container/Tube: Plastic vial
Specimen Volume: 1 mL
Collection Instructions:
1. If multiple specimens are drawn, submit each vial under a separate order.
2. Label specimens with corresponding draw time.
Specimen Minimum Volume
0.5 mL
Specimen Stability Information
| Specimen Type | Temperature | Time |
|---|---|---|
| Serum | Frozen (preferred) | 30 days |
| Refrigerated | 24 hours |
Reference Values
<100 pg/mL
There is no evidence that fasting serum gastrin levels differ between adults and children. Although 8-hour fasts are difficult or impossible to enforce in small children, serum gastrin levels after shorter fasting periods (3-8 hours) may be 50% to 60% higher than the 8-hour fasting value.
For SI unit Reference Values, see https://www.mayomedicallaboratories.com/order-tests/si-unit-conversion.html.
Day(s) and Time(s) Performed
Monday through Friday; 5 a.m.-12 a.m.
Saturday; 6 a.m.-6 p.m.
Test Classification
This test has been cleared or approved by the U.S. Food and Drug Administration and is used per manufacturer's instructions. Performance characteristics were verified by Mayo Clinic in a manner consistent with CLIA requirements.CPT Code Information
82941
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| GAST | Gastrin, S | 2333-3 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| GAST | Gastrin, S | 2333-3 |
Reject Due To
|
Hemolysis |
Mild OK; Gross reject |
|
Lipemia |
Mild OK; Gross OK |
|
Icterus |
NA |
|
Other |
Nonfasting specimens |
Method Name
Automated Chemiluminescent Immunometric Assay
Forms
If not ordering electronically, complete, print, and send 1 of the following forms with the specimen:
Oncology Test Request Form (T729) (http://www.mayomedicallaboratories.com/it-mmfiles/oncology-request-form.pdf)
Benign Hematology Test Request Form (T755) (http://www.mayomedicallaboratories.com/it-mmfiles/benign-hematology-test-request-form.pdf)