Gastrin

Test Code

GASTN

Alias/See Also

LAB80

CPT Codes
<p>82941</p>

Preferred Specimen

Patient Preparation: Dietary supplements containing biotin may interfere in assays and may skew analyte results to be either falsely high or falsely low. For patients receiving the recommended daily doses of biotin, draw samples at least 8 hours following the last biotin supplementation. For patients on mega-doses of biotin supplements, draw samples at least 72 hours following the last biotin supplementation.

Specimen Type: Serum

Collection Container/Type

Preferred: Serum gel

Acceptable: Red top

Submission Container/Tube: Plastic vial

Specimen Volume: 1 mL

Patient Preparation
Overnight fasting is required, preferably 12 hours or more.

Minimum Volume

0.5 mL

Instructions

Dietary supplements containing biotin may interfere in assays and may skew analyte results to be either falsely high or falsely low. For patients receiving the recommended daily doses of biotin, draw samples at least 8 hours following the last biotin supplementation. For patients on mega-doses of biotin supplements, draw samples at least 72 hours following the last biotin supplementation.

Transport Container

Transport tube

Transport Temperature

Frozen

Specimen Stability

Room temperature: Unacceptable

Refrigerated: Unacceptable

Frozen: 28 days

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)

Thawed specimens • Gross hemolysis • Gross lipemia • Grossly icteric

Methodology

Immunoassay (IA)

Setup Schedule

Set up: Mon-Sat; Report available: 1-2 days

Report Available

Next day

Reference Range

Reference range applies to fasting specimen only

<5 years	Not established
5-17 years	<65 pg/mL
≥18 years	≤100 pg/mL

Clinical Significance

For the diagnosis and monitoring of gastrin-secreting tumors, gastric ulcer, Zollinger-Ellison syndrome. Increased in pernicious anemia.

Performing Laboratory
Quest Diagnostics Nichols Institute 14225 Newbrook Drive Chantilly, VA 20153

Last Updated: February 23, 2012

The CPT Codes provided in this document 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 payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.