Update Type: Miscellaneous
Test Updated: 10/02/2024
Test Overview
Test Methodology
Chemiluminescent Immunoassay
Test Usage
Differential diagnosis of primary hypothyroidism from secondary hypothyroidism and hyperthyroidism.
Reference Range *
0.30 - 5.50 mU/L
* Reference ranges may change over time. Please refer to the original patient report when evaluating results.
Test Limitations
Specimen may be kept at room temperature for no more than 8 hours.
Test Details
Days Set Up
Daily, 24 hours
Analytic Time
4 hours
Soft Order Code
TSH
MiChart Code
TSH (Thyroid Stimulating Hormone)
Synonyms
- ssTSH
- Thyrotropin
- TSH
- TSH, 3rd Generation
- TSH, Ultra Sensitive / High Sensitivity (HS-TSH)
- TSH-3rd GENERATION (ssTSH)
Laboratory
Chemical Pathology
Section
Automation
Specimen Requirements
Collection Instructions
Collect specimen in a red top or SST tube. Centrifuge, aliquot serum into a plastic vial and refrigerate up to 48 hours or freeze for longer storage.
Alternate Specimen
Red Top Tube; Green Top Tube (heparinized plasma)
Normal Volume
0.5 mL serum
Minimum Volume
0.25 mL serum
Billing
CPT Code
84443
Fee Code
32022
LOINC
11580-8