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IGF-1, Adult

Item Value
Approval req'd? No
Available Stat? No
Test code AIGF1
Test group IGF1
Performed by Quest
Sendout? Yes
Method LC/MS
Container type Red top or Gold top
Amount to Collect 1 mL blood
Sample type Serum
Preferred volume 0.5 mL serum
Min. Volume 0.3 mL serum
Processing notes Freeze aliquot and send to China Basin for sendout
Units ng/mL
Normal range Age
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
Synonyms IGF1; Somatomedin C
Stability Room temperature 2 days, refrigerated 5 days, frozen 1 week, frozen at -70C 3 weeks
Turn around times 3-5 days
Additional information Insulin-like growth factor I (IGF-I, or somatomedin C), a protein involved in stimulating somatic growth, is regulated principally by growth hormone (GH) and
nutritional intake. IGF-I is transported in serum by several proteins; this helps maintain relatively high IGF-I plasma levels and minimizes fluctuations in serum IGF-I

Measuring IGF-I is useful in several growth-related disorders. Dwarfism caused by deficiency of growth hormone (hypopituitarism) results in decreased serum levels of IGF-I, while acromegaly (growth hormone excess) results in elevated levels of IGF-I. IGF-I measurements are also helpful in assessing nutritional status; levels are reduced in under-nutrition and restored with a proper diet.
CPT coding 84305-90
Last Updated 5/22/2013 1:34:49 PM
Entry Number 1508
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