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Test Code 5211 IGF1 - Insulin-like Growth Factor (Somatomedin C)

Specimen Containers and Fixatives

Gold Top Tube (SST)

Specimen Required

NorthShore Lab Services: draw 2.5 mL (0.5 min) blood, centrifuge and submit 1.0 mL (0.2 min) frozen serum
.
Hospital setting: submit 2.5 mL (0.5 min) blood.

Day(s) and Time(s) Performed

Monday – Friday, 5 days

Reference Values

Preterm (ng/mL)

Birth: 21-93

2 months: 23-163

4 months: 23-171

6 months: 15-132

12 months: 15-179

Values for preterm infants determined at these ages from expected term gestation.

Term Birth (ng/mL)

Birth: 15-109

2 months: 15-109

4 months: 7-1124

6 months: 7-93

12 months: 15-101

Female (ng/mL)

1-2 years: 56-144

3-4 years: 74-202

5-6 years: 82-262

7-8 years: 112-276

9-10 years: 140-308

11-12 years: 132-376

13-14 years: 192-640

15-16 years: 217-589

17-18 years: 176-452

19-20 years: 217-475

21-30 years: 87-368

Male (ng/mL)

1-2 years: 30-122

3-4 years: 54-178

5-6 years: 60-228

7-8 years: 113-261

9-10 years: 123-275

11-12 years: 139-395

13-14 years: 152-540

15-16 years: 257-601

17-18 years: 236-524

19-20 years: 281-510

21-30 years: 155-432

Method Name

RIA

CPT Code Information

84305

LOINC Code Information

2484-4

Restrictions

Centrifuge and send frozen serum.