T3, Free Blood Test

$48.00 $32.00
Triiodothyronine, Free T3, is not affected by certain protein levels causing them to remain more constant. This test will therefore assess abnormal binding protein disorders. Triiodothyronine (T3) is a thyroid hormone that plays a role in nearly every physiological process in the body. It plays a key role in development, growth, the regulating of heart rate, metabolism and the body's temperature. Possible thyroid issues can be hyperthyroidism, hypopituitarism, primary or secondary hypothyroidism and thyrotoxic periodic paralysis. A thyroid disorder can create symptoms of anxiety to constipation.
  • Tests Included: 1

  • Est. 2 days Turnaround

  • Specimen type: Blood

T3, Free
  • Test Code: 34429
  • CPT Code: 84481
  • Alternate Name: Triiodothyronine, Free T3
  • Test Instructions : --

    Please do not exercise prior to testing. It is best that your blood is taken in a rested state.

  • Fasting: No
  • Methodology: Immunoassay (IA)
  • Results In: 2

    Note: Turn around times on results are an estimate and are not guaranteed. The lab may need additional time due to holidays, confirmation/repeat testing, etc. You can contact us to discuss when your results should be ready and we will contact the lab on your behalf immediately.

Used to assess thyroid function
  • Step 1

    Your Tests

    Doctor’s order provided & Same Day Testing.

  • Step 2

    Go to
    Local Lab

    Your specimen will be collected for you at a local testing center.

  • Step 3


    Results sent electronically in 2-3 days* More complex tests take longer.

  • Step 4

    Better Decisions

    Use your lab results to help make better health decisions. Knowledge is nothing if it isn’t used.


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