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HelpTest Code LAB129 Thyroid-Stimulating Hormone (TSH)
Useful For
Evaluating the hypothalamus, pituitary, and thyroid systems
Methodology
Electrochemiluminescence Immunoassay (ECLIA)
Performing Laboratory
Bozeman Health Laboratory Services
Specimen Requirements
Specimen Type: Plasma or serum
Container/Tube: Light-green top (lithium heparin gel), red top, or gold top
Specimen Volume: 1 mL
Specimen Minimum Volume: 0.5 mL
Specimen Rejection: Samples should not be taken from patients receiving therapy with high
biotin doses (i.e. > 5 mg/day) until at least 8 hours following the last biotin
administration.
Specimen Transport Temperature
Ambient/Refrigerated
Specimen Stability
| Specimen Type | Temperature | Time |
|---|---|---|
| Plasma or Serum | Ambient | 8 days |
| Refrigerated | 14 days | |
| Frozen | 2 years |
Reference Values
1 month - 23 months: 0.82 - 5.91 µIU/mL
23 months - 12 years: 0.66 - 3.90 µIU/mL
12 years - 20 years: 0.46 - 3.98 µIU/mL
20 years and older: 0.34 - 4.82 µIU/mL
Day(s) Test Set Up
Monday through Sunday
Test Classification and CPT Coding
84443
Additional Information
If TSH reflex testing is desired, order test BLOD5008 TSH Reflex Screen