Growth Hormone, 60 Minutes
Ordering Recommendation
GH 60
Quantitative Chemiluminescent Immunoassay
1-2 days
New York DOH Approval Status
This test is New York DOH approved.
Submit With Order
ARUP Consult®
Disease Topics
Specimen Required
Patient Preparation
Plasma separator tube or serum separator tube. Collect one tube per timed specimen. Also acceptable: Green (sodium or lithium heparin) or lavender (EDTA), or pink (K2EDTA). 
Specimen Preparation
Allow specimen to clot completely at room temperature.  Separate serum or plasma from cells ASAP or within 2 hours of collection. Transfer 1 mL serum or plasma per timed specimen to individual ARUP Standard Transport Tubes. (Min: 0.4 mL per timed specimen) 
Storage/Transport Temperature
Frozen. Also acceptable: Refrigerated 
Unacceptable Conditions
Tissue or urine. Grossly hemolyzed or lipemic specimens. 
Ambient: 24 hours; Refrigerated: 1 week; Frozen: 2 months 
Reference Interval
Interpretive Data
Growth hormone stimulation tests should induce a peak of greater than 5 ng/mL in children and greater than 4 ng/mL in adults; lower values suggest growth hormone deficiency. For children, some experts consider values of 5-8 ng/mL equivocal and only peak values of greater than 8 ng/mL as truly normal.

For suppression testing, normal subjects have growth hormone concentrations of less than 0.8 ng/mL within 2 hours of ingestion of a 75 or 100 gram glucose dose. Patients with acromegaly fail to show normal suppression.

This Growth Hormone assay is now standardized to the Recombinant Second International Standard (IS): 98/574. Growth hormone results read approximately 25 percent lower than with the previous standards (First IS: 80/505). Reference ranges have also been modified according to the assay manufacturer.
Hotline History
Component Test Code*Component Chart NameLOINC
0070083Growth Hormone 60 Minutes14146-5
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  • GH
  • GH testing
  • GHRH
  • Growth Hormone Provocative Test
  • Growth Hormone Stimulation
  • growth hormone, Serum
  • hGH
  • Human Growth Hormone
  • Somatotrophic Hormone
  • Somatotropin