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T4 Free (FT4) Blood Test

Total reviews 235

Sample Report

$41.25 $27.50

Total reviews 235


Sample Report

  • Tests Included: 1

  • Est. 3-5 days Turnaround

  • Specimen type: Blood

  • Quest Diagnostics Location

Most of the T4 in your body is bonded to protein, and a smaller portion (free) has not. This is why there is a free T4 test and a total T4 test. A free T4 test is usually preferred because from this test you can see how much is available for the body to use. This test can be ordered if a TSH has come back abnormal. Pregnancy can also affect your T4 levels.

$41.25 $27.50
  • Tests Included: 1

  • Est. 3-5 days Turnaround

  • Specimen type: Blood

  • Quest Diagnostics Location

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T4 Free (FT4)

  • Test Code: 866
  • CPT Code: 84439
  • Alternate Name: FT4, Thyroxine
  • 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: 3-5

    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.

$41.25 $27.50

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