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Order Code T3TOT T3 Total, serum

Specimen Requirements


Preferred: Serum, gold-top gel tube

Acceptable: Plain, red-top tube

Specimen Volume: 2.0 mL


Specimen Minimum Volume

1.0 mL

Performing Laboratory

Ridgeview Medical Center Laboratory

Day(s) Test Set Up

Monday- Sunday



Useful For

Second-order testing for hyperthyroidism in patients with low thyroid-stimulating hormone values and normal thyroxine levels

Specimen Transport Temperature

Serum Ambient 8 hours
  Refrigerated (preferred) 5 days
  Frozen OK


Reference Range

60-181 ng/dL