INSULIN-LIKE GROWTH FACTOR I (IGF-1)

Test Documentation
Specimen Required
Draw blood in a SST. Centrifuge, separate and send 1.0 mL serum (0.5 mL minimum) frozen immediately in a screw-capped plastic vial.

Alternate Specimen
Serum: Red-top
Plasma: EDTA, heparin

Rejection Criteria
Hemolyzed specimens, grossly lipemic specimens

Methodology
Chemiluminescence

Stability
Room Temperature: Unacceptable; Refrigerated: Unacceptable; Frozen: 14 days

Reference Range
Males:
AGE   Reference Range (ng/mL)  
0-11 months   15-150  
1 year:   18-179  
2 years:   22-204  
3 years:   25-224  
4 years:   28-241  
5 years:   32-259  
6 years:   36-281  
7 years:   42-311  
8 years:   49-351  
9 years:   58-401  
10 years:   70-458  
11 years:   82-516  
12 years:   93-567  
13 years:   103-603  
14 years:   111-620  
15 years:   115-618  
16 years:   115-598  
17 years:   113-566  
18 years:   109-527  
19 years:   104-484  
20 years:   98-443  
21-25 years:   83-344  
26-30 years:   75-275  
31-35 years:   71-241  
36-40 years:   69-226  
41-45 years:   64-210  
46-50 years:   59-201  
51-55 years:   56-201  
56-60 years:   51-194  
61-65 years:   47-191  
66-70 years:   46-195  
71-75 years:   42-187  
76-80 years:   39-184  
80-85 years:   37-182  
85-90 years:   35-182  
Reference values have not been established for patients that are >90 years of age.
Females:
Age   Reference range (ng/mL)  
0-11 months:   18-146  
1 year:   20-159  
2 years:   23-177  
3 years:   27-198  
4 years:   32-223  
5 years:   36-246  
6 years:   41-269  
7 years:   48-299  
8 years:   56-339  
9 years:   68-396  
10 years:   83-465  
11 years:   99-537  
12 years:   115-598  
13 years:   126-637  
14 years:   133-647  
15 years:   134-631  
16 years:   130-595  
17 years:   123-546  
18 years:   114-493  
19 years:   105-441  
20 years:   97-398  
21-25 years:   84-323  
26-30 years:   77-271  
31-35 years:   73-244  
36-40 years:   68-225  
41-45 years:   62-205  
46-50 years:   56-194  
51-55 years:   53-191  
56-60 years:   45-173  
61-65 years:   41-168  
66-70 years:   39-168  
71-75 years:   36-166  
76-80 years:   35-168  
80-85 years:   35-179  
85-90 years:   33-179  
Reference values have not been established for patients that are >90 years of age.

Performed
Monday-Friday

Turnaround Time3 days
Test CodeIGF1
CPT-4 Code (s)
84305
LOINC Codes
2484-4

Warde
Medical
Laboratory