IGF Binding Protein 1 (IGFBP-1)

IGF Binding Protein 1, IGFBP1, IFBP-1, Insulin-Like Growth Factor (IGF) Binding Protein 1

Test Codes

EPIC: LAB1232034, Beaker: IGF Binding, Quest: 36590

Department

Send Outs

Instructions

Overnight fasting is preferred.

Specimen Collection Criteria

Collect (preferred specimen): One Gold top Serum separator tube (SST).

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 refrigerate (2-8°C or 36-46) prior to transport.

Preparation for Courier Transport

Transport: 1.0 mL serum, refrigerated (2-8°C or 36-46). (Minimum: 0.2 mL)

Rejection Criteria

• Gross hemolysis.
• 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 refrigerate (2-8°C or 36-46).

Transport: 1.0 mL serum, refrigerated at (2-8°C or 36-46). (Minimum: 0.5 mL)

Storage

Specimen Stability for Testing:

Room Temperature (20-26°C or 68-78.8°F): 24 hours
Refrigerated (2-8°C or 36-46°F): 7days
Frozen (-20°C/-4°F or below): 28 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 Mayo Clinic Laboratories in Rochester, MN. Forwarded to LabCorp Esoterix Endocrinology, Calabassas Hills, CA.

Performed

Tuesday.
Results available in 3-9 days.

Reference Range

Adults	5-34 ng/mL
5-9 Years	15-95 ng/mL
10-14 Years	8-64 ng/mL
15-18 Years	5-40 ng/mL

Test Methodology

Radioimmunoassay (RIA)

CPT Codes

83519

Contacts

Last Updated

12/17/2025