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Epic Code LAB1230538 Growth Hormone, Random

Important Note

Fasting specimen required

Test Name Alias

hGH | Somatotrophic Hormone | Human Growth Hormone | 6685

Interface Order Alias


Quick Collect


Collection Instructions

Specimen Collection: Blood

Container(s): Gold Top (Serum Separator-SST Gel) or Red Top (Plain, No additive) or Mint Green Top (Lithium Heparin Gel)

Preferred Volume to Collect: 5.0 mL

Minimum Volume to Collect: 2.0 mL

Neonate Volume to Collect: 0.5 mL

Capillary collect ok: Yes

Microtainer acceptable: Yes


Collection Instructions:

  • Fasting specimen required.
  • Gold/Red tube: Gently invert 8 –  10 times to mix clot activator with blood.
  • Mint Green tube: Gently invert 8 – 10 times to mix lithium heparin anticoagulant with blood.
  • Specimen should be processed as soon as possible - See processing instructions


Processing Instructions (Laboratory, Outpatient or Off-site collection)

  • Processed Specimen: Serum/Plasma
  • Centrifuge/Spin: Yes
  • Aliquot: Yes
  • Minimum volume plasma/serum:1.0 mL
  • Processing Instructions:
    • Serum is preferred specimen type.
    • Gold Tube/Serum: Allow blood to clot for 30 minutes in a vertical position and centrifuge within 2 hours. Pour over specimen in aliquot tube and freeze immediately (before transport).
    • Green Tube/Plasma: Centrifuge after collection. Pour over specimen in aliquot tube and freeze immediately (before transport).
  • Transport Temperature: Frozen

Rejection Criteria

  • Specimen not centrifuged promptly after collection.
  • Centrifuged serum not meeting specimen stability requirements.

Specimen Stability


  • Ambient:  8 hours
  • Refrigerated:  24 hours
  • Frozen:  28 days
  • Laboratory Retention:  7 days

Test Frequency

Available Monday through Friday, usual TAT 1 to 3 days

Reference Range

 <5.0 ng/ml


Growth hormone has a short halflife and is secreted in an episodic manner.  Consequently, a single random value may not be adequate for evaluating growth hormone adequacy.

Performing Department


Performing Department Laboratory Location

Corewell Health Reference Laboratory, Grand Rapids, MI





CDM Code


Epic Test ID



Growth Hormone: 2963-7

Mayo Access Code

Not available

Reviewed Date