Test ID: Q0410
CPT code: 83003
LOINC: 2963-7
Specimen Type: Red or SST
Frequency: 4 days
Instructions: 0.8 mL Serum from Red or SST, Refrigerated. Min 0.2 mL.
Text: Pituitary function test useful in the diagnosis of hypothalamic disorder, hypopituitarism, acromegaly, & ectopic growth hormone production by neoplasm. A single fasting growth hormone level is of limited value. Secretion of GH is episodic and pulsatile. Testing for GH deficiency or excess is best done as part of a dynamic test involving specific stimuli
Methodology: Immunochemiluminometric assay (ICMA)