Test Code

CPT Codes

Preferred Specimen
1.8 mL plasma collected in an EDTA (lavender-top) tube

Minimum Volume
0.6 mL

Draw in a pre-chilled lavender-top tube. Separate and freeze immediately. Do not thaw.

Transport Container
Plastic screw-cap vial

Transport Temperature

Specimen Stability
Room temperature: 8 hours
Refrigerated: 8 hours
Frozen: 28 days

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Received room temperature • Received refrigerated • Lipemic • Gross hemolysis • Gross icteric

Extraction • Immunoassay (IA)

FDA Status
This test was developed and its analytical performance characteristics have been determined by Quest Diagnostics. It has not been cleared or approved by the U.S. Food and Drug Administration. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.

Setup Schedule
Set up: Tues; Report available: 8 days

Reference Range
≤30 pg/mL

Clinical Significance
Somatostatin is a neurohormone produced in the brain, hypothalamus and gastrointestinal tract. This test is used to diagnose somatostatin-producing tumors. Elevated levels are observed with somatostatinoma, medullary thyroid carcinoma and pheochromocytoma.

Performing Laboratory
Quest Diagnostics Nichols Institute-San Juan Capistrano, CA
33608 Ortega Highway
San Juan Capistrano, CA 92675-2042

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.