IGF2

Insulin Like Growth Factor 2, Somatomedin A

Test Codes

EPIC: LAB1231959, Beaker: IGF 2, Quest: 92790

Department

Send Outs

Specimen Collection Criteria

Collect (preferred specimen): One Gold-top SST tube.
Also acceptable: One plain Red-top tube.

Physician Office/Draw Specimen Preparation

Let specimen clot 30-60 minutes then centrifuge to separate serum from cells. Transfer serum to plastic transport tube and maintain at room temperature (20-26°C or 68-78.8°F) prior to transport.

Preparation for Courier Transport

Transport: 0.5 mL serum, room temperature (20-26°C or 68-78.8°F). (Minimum: 0.3 mL)

Rejection Criteria

• Hemolyzed specimens.
• Grossly lipemic.
• Plasma. 
• Specimens not collected and processed as indicated.

In-Lab Processing

Let specimen clot 30-60 minutes then centrifuge to separate serum from cells. Transfer serum to plastic transport tube and maintain at room temperature (20-26°C or 68-78.8°F) prior to transport.

Transport: 0.5 mL serum, room temperature (20-26°C or 68-78.8°F). (Minimum: 0.3 mL) 

Storage

Specimen Stability for Testing:

Room Temperature (20-26°C or 68-78.8°F): 7 days
Refrigerated (2-8°C or 36-46°F): 7 days
Frozen (-20°C/-4°F or below): 21 days
Frozen (-70°C/-94°F or below): 34 days

Specimen Storage in Department Prior to Disposal:

Specimen retention time is determined by the policy of the reference laboratory. Contact the Send Outs Laboratory with any questions. 

Laboratory

Sent to Quest Diagnostics, Wood Dale, IL.

Performed

Monday, Thursday.
Results available in 4-7 days.

Reference Range

   <2 Years  Not established
2-17 Years  260-630 ng/mL
 ≥18 Years  267-616 ng/mL

Test Methodology

Chromatography/Mass Spectrometry.

Clinical Utility

IGF-2 – IGF-2 measurements are useful in the diagnosis of growth disorders, as an adjunct to IGF-1.

CPT Codes

83542

Contacts

Last Updated

11/19/2025