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

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)
Yellow Top Tube
Normal Volume
0.5 mL serum
Minimum Volume
0.25 mL serum
Billing
CPT Code
84443
Fee Code
32022
LOINC
11580-8
NY State Approved
No