IGF-1, LC/MS

Quest Diagnostics

Sample type: Serum

Requires fasting: No

Phlebotomy required

Details

This test is important for diagnosing different conditions related to growth.

Biomarker summary

IGF-1, LC/MS
Z-Score

Additional details

Estimated days for results: Results should be available in 2 - 5 business days after the sample is collected

Details

IGF-1, LC/MS - Insulin-like Growth Factor 1 (IGF-1, or Somatomedin C) is a protein that plays a crucial role in stimulating growth throughout the body. It works closely with Growth Hormone (GH) and is affected by what we eat. IGF-1 moves around in the blood, attached to several proteins, which helps keep its levels stable and prevents big changes in how much IGF-1 is in the blood.

What patients is this test right for?

This test is important for diagnosing different conditions related to growth. For example, if someone is not growing as expected (a condition known as Dwarfism due to Hypopituitarism), it might be because they have low levels of IGF-1. On the other hand, very high levels of IGF-1 can indicate acromegaly, a condition where someone grows too much because of too much growth hormone. This test is also used to check if someone's diet is affecting their growth, as not eating enough can lower IGF-1 levels, which then return to normal with proper nutrition.

What type of sample is required for this test?

0.5 mL serum. A blood sample is needed.

Average sample processing time

3–5 business days

Reference range

Pediatric Male (ng/mL) Female (ng/mL)
<1 Years 14-142 17-185
1-1.9 Years 12-134 15-175
2-2.9 Years 12-135 16-179
3-3.9 Years 30-155 38-214
4-4.9 Years 28-181 34-238
5-5.9 Years 31-214 37-272
6-6.9 Years 38-253 45-316
7-7.9 Years 48-298 58-367
8-8.9 Years 62-347 76-424
9-9.9 Years 80-398 99-483
10-10.9 Years 100-449 125-541
11-11.9 Years 123-497 152-593
12-12.9 Years 146-541 178-636
13-13.9 Years 168-576 200-664
14-14.9 Years 187-599 214-673
15-15.9 Years 201-609 218-659
16-16.9 Years 209-602 208-619
17-17.9 Years 207-576 185-551

Adult (ng/mL)
18-19.9 Years 108-548
20-24.9 Years 83-456
25-29.9 Years 63-373
30-39.9 Years 53-331
40-49.9 Years 52-328
50-59.9 Years 50-317
60-69.9 Years 41-279
70-79.9 Years 34-245
>80 Years 34-246

Z-Score (Male) -2.0 - +2.0 SD
Z-Score (Female) -2.0 - +2.0 SD

Pediatric Tanner Stages See Laboratory Report

Health categories

Patient instructions

Blood Draw Options with Fullscript
Fullscript offers several convenient phlebotomy options to complete your lab testing:

Quest Diagnostics Patient Service Centers (PSC)

Location: Visit a nearby Quest Diagnostics Patient Service Center.
Cost: $10 sample collection fee (paid during lab order checkout).
Scheduling: Schedule your appointment here. Appointments are recommended to reduce wait times. Walk-ins are accepted, but may experience delays. Aim to arrive 10 minutes before your appointment.
Collection Instructions:

Bring a valid ID.
Bring your digital or printed requisition form, available in the Labs tab of your Fullscript account.

Check-in: Scan the QR code from your confirmation email or follow kiosk instructions.
More Info: Quest Diagnostics blood draw guide

Getlabs Mobile Phlebotomy

Location: Sample collection at your home or office.
Cost: $85 sample collection fee (paid during lab order checkout).
Availability: Available in most locations – enter your ZIP code during checkout to confirm.
Scheduling: Schedule your appointment here through your Fullscript account.
Collection Instructions: