| Test Name: | Growth Hormone (hGH) |
| Epic Order Code: | LAB525 | | |
| CPT Code: | 83003 | | |
| Specimen(s) Type: | Serum, 1.0 mL | | |
| Acceptable Container(s): |   Tops are gold and red. |
| Testing Schedule: | Monday-Saturday |
| Turn Around Time: | STAT: NA | | |
| | Routine: 2-4 days |
| Collection Information: | Fasting specimen is preferred. Obtain by standard collection procedures. |
| Transport Information: | Deliver to lab immediately. All specimens must be signed into the laboratory. |
| Reference Clients: | If unable to deliver to the lab within 1 hour, centrifuge the specimen and remove serum from the red cells. Store and transport at 2-8° C up to 3 days. If longer storage is required, store and transport at -20° C up to 2 months. |
| Causes for Rejection: | Improperly labeled, incorrect container, contaminated, insufficient volume, incorrect/delay in transport. |
| Reference Range: | Males: 0.01-0.97 ng/mL |
| | Females: 0.01-3.61 ng/mL |
| Additional Information: | Because hGH levels in normal and diseased populations overlap, hGH suppression and stimulation tests are needed to evaluate conditions of hGH excess and deficiency; random hGH levels are inadequate. |